You more or less answered your own question in the early portion. It is something I've witnessed many times IN PERSON from Christians that will declare how much they love me and then work hard to get me to abandon my faith in God through Judaism to become a Christian and "accept" Jesus sacrifice for my sin.
After we have "rejected" their heart felt message, many turn from telling us how much they love us to then declaring that if we don't believe the way they do, that if we don't "accept" Jesus, we are of "our father the devil" and then we hear all the antisemitic passages in the New Testament hurled at us telling us how we are evil and will suffer eternally.
No one here can delve into Martin Luther's dead mind to know for certainty, but his writings certainly reflect that thinking.
The Fordham University translation that was the most reputable and well known..of On Jews and Their Lies I see has been removed because of some kind of copyright infringement so I just Googled for another reference. I haven't read through this one to verrify it,
However millions of Jews over the centuries, even before the Nazis, suffered in waves of persecution with people often quoting Martin Luther.
I could point out a yahoo user or two who displayed the exact same type of behavior and then you ask them why THEY turned from writing words of love about Jews to writing horrible wishes and hate about Jews..and see if you can get any reason. My guess is that it will be the same sort of justification used BY Martin Luther and later Hitler...that they were doing the work of God and enacting the curse that Jews have for "rejecting" Jesus
edit: The second link below is one I hope all here will read. It is a cache of a page I can't seem to open today.
The following is from that link:
Although Luther did not invent anti-Jewishness, he promoted it to a level never before seen in Europe. Luther bore the influence of his upbringing and from anti-Jewish theologians such as Lyra, Burgensis, (and John Chrysostom, before them). But Luther's 1543 book, "On the Jews and their lies" took Jewish hatred to a new level when he proposed to set fire to their synagogues and schools, to take away their homes, forbad them to pray or teach, or even to utter God's name. Luther wanted to "be rid of them" and requested that the government and ministers deal with the problem. He requested pastors and preachers to follow his example of issuing warnings against the Jews. He goes so far as to claim that "We are at fault in not slaying them" for avenging the death of Jesus Christ. Hitler's Nazi government in the 1930s and 40s fit Luther's desires to a tee.
So vehemently did Luther speak against the Jews, and the fact that Luther represented an honorable and admired Christian to Protestants, that his written words carried the "memetic" seeds of anti-Jewishness up until the 20th century and into the Third Reich. Luther's Jewish eliminationist rhetoric virtually matches the beliefs held by Hitler and much of the German populace in the 1930s.
Luther unconsciously set the stage for the future of German nationalistic fanaticism. William L. Shirer in his "The Rise and Fall of the Third Reich," puts it succinctly:
"Through his sermons and his magnificent translations of the Bible, Luther created the modern German language, aroused in the people not only a new Protestant vision of Christianity by a fervent German nationalism and taught them, at least in religion, the supremacy of the individual conscience. But tragically for them, Luther's siding with the princes in the peasant rising, which he had largely inspired, and his passion for political autocracy ensured a mindless and provincial political absolutism which reduced the vast majority of the German people to poverty, to a horrible torpor and a demeaning subservience. Even worse perhaps, it helped to perpetuate and indeed to sharpen the hopeless divisions not only between classes but also between the various dynastic and political groupings of the German people. It doomed for centuries the possibility of the unification of Germany."
In Mein Kampf, Hitler listed Martin Luther as one of the greatest reformers. And similar to Luther in the 1500s, Hitler spoke against the Jews. The Nazi plan to create a German Reich Church laid its bases on the "Spirit of Dr. Martin Luther." The first physical violence against the Jews came on November 9-10 on Kristallnacht (Crystal Night) where the Nazis killed Jews, shattered glass windows, and destroyed hundreds of synagogues, just as Luther had proposed. In Daniel Johah Goldhagen's book, Hitler's Willing Executioners, he writes:
"One leading Protestant churchman, Bishop Martin Sasse published a compendium of Martin Luther's antisemitic vitriol shortly after Kristallnacht's orgy of anti-Jewish violence. In the foreword to the volume, he applauded the burning of the synagogues and the coincidence of the day: 'On November 10, 1938, on Luther's birthday, the synagogues are burning in Germany.' The German people, he urged, ought to heed these words 'of the greatest antisemite of his time, the warner of his people against the Jews.'"
No apologist can claim that Martin Luther bore his anti-Jewishness out of youthful naivete', uneducation, or out of unfounded Christianity. On the contrary, Luther in his youth expressed a great optimism about Jewish conversion to Christianity. But in his later years, Luther began to realize that the Jews would not convert to his wishes. His anti-Jewishness grew slowly over time. His logic came not from science or reason, but rather from Scripture and his Faith. His "On the Jews and Their Lies" shows remarkable study into the Bible and fanatical biblical reasoning. Luther, at age 60 wrote this dangerous "little" book at the prime of his maturity, and in full knowledge in support of his beliefs and Christianity.
paperback makes an excellent point that there was hate there before the realization that his message wasn't going to be any more effective than the Catholic, that the belief that Jews were to be thought evil for "rejecting' the New Testament doctrine was already there. He was simply withholding that tenet until he was convinced that Jews weren't going to accept his version or rationale with his reformation of Christian doctrine.
not sure how much of this will post but it is also one reason why I wanted folk to go to that second link:
"Luther not only wrote 'On the Jews and their lies,' but also dubious and intolerant works such as 'Against the Sabbatarians', 'Against the Antinoman,' and 'Against the Robbing and Murdering Hordes of Peasants.' In the latter, Luther called for the stabbing and slaying of peasant rebels which triggered the death of an estimated 100,000 human beings. These rebels were not only Christians but were mostly slaughtered after their surrender to the German princes. Nor did Luther apologize for his treatise even after world criticism. In his response to his critics in "An Open Letter on the Harsh Book," Luther reiterated his venom: "Therefore, as I wrote then so I write now; Let no one have mercy on the obstinate, hardened, blinded peasants who refuse to listen to reason; but let everyone, as he is able, strike, hew, stab, and slay, as though among mad dogs, put to flight, and led astray by these peasants, so that peace and safety may be maintained." In all these harsh treatises, Luther provided an abundance of Biblical passages to justify his attack on his enemies. And, or course (sarcastically speaking), his actions were always through Christian "love" of his enemies, as he audaciously wrote: "The merciless punishment of the wicked is not being carried out just to punish the wicked and make them atone for the evil desires that are in their blood, but to protect the righteous and to maintain peace and safety. And beyond all doubt, these are precious works of mercy, love, and kindness. . ." [Bold characters, mine].
Most Christians staunchly defend their ideas of "true" Christianity (never seemingly to realize that other Christians have their own ideas, or if so, they get labeled as false Christians), but Luther had power and influence, and he vehemently opposed anyone who went against his version of True Christianity. One cannot deny Luther lived as a Christian, and an influential one at that. So to oppose him for practicing his brand of religion cannot serve to justify Christianity anymore than Oskar Schindler can be used to justify "true" Nazism, or neo-communists to justify Communism, or war to justify murder.
But perhaps the most lasting damage of all came from Luther openly advocating the abandonment of using natural reason (Luther considered his use of theological reasoning different from natural reason, i.e., scientific reasoning) . His theological message to live by faith and to abstain from listening to reason has mentally enslaved the lives of millions of Christians to this day. Throughout his literary life he wrote statements such as, "Whoever wishes to be a Christian, let him pluck out the eyes of his reason," "We must give reason a vacation and enter a different school. We must refrain from consulting reason. We must bid reason hold its peace; we must order it to be dead. We must gouge out its eyes and pluck its feathers...," "You must kill the other thoughts and the ways of reason or of the flesh, for God detests them." I can find no other influential writer who has spent as much ink, ad nauseum, against the very investigative tool which has kept the human species alive-- reason.