Very good series of questions!
I`ll do my best to share with you what I have learnt.
Q 'How will you know its him?'
A There is no comparrisson, it will be an event no-one can miss, It will be a worldstopping, awesome decent through the clouds, but the arrival is seen in the east first of all. A cloud seen in the East the size of a mans hand and will increase in size. A scene only worthy glory, filling the skies with heavenly angels all moving close to earth with the decent of Christ Himself who has left heavens realm to return to earth to ressurect and collect His redeemed.
Hollywood tried to express on the big screne the kind of idea ( something even more jaw dropping than those massive mother ships breaking through the clouds on 'Independance Day' the movie...)
Christs second coming is described in techicolor and detail.It is not vague, nor open to interpretation!
Let me list the events which will happen from scripture (NT, and the revelations given to believers are believed to be given by the Spirit of God to man)
Christs coming will be immitated by the great deceiver. He will try to claim a manifestation of Christ and claim all glory as his.
23 Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
26 Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
27 For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
2. His coming is Heavenly not growing up on earth a man then revealing Himself..no. He will decend as heavenly King accompanied by the heavenly Host."When the Son of man shall come in his glory, and all the holy angels with him, then shall he sit upon the throne of his glory." Matthew 25:31.
The Scriptures promise that Jesus will return to this earth in the same manner that He left at His ascension--in a visible, literal, bodily, personal manner. Matthew 24:30 says, "They shall see the Son of man coming in the clouds of heaven with power and great glory." He will come in the clouds literally, as a personal being with a body of flesh and bones (Luke 24:36-43, 50, 51), and His coming will be visible. Scripture is clear on these facts.
3. He will decend with a voice of an arc angel to raise the dead! No other counterfiet can do this!
"For the Lord himself shall descend from heaven ... and the dead in Christ shall rise first: Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord." 1 Thessalonians 4:16, 17. "We shall all be changed, ... and the dead shall be raised incorruptible. For ... this mortal must put on immortality." 1 Corinthians 15:51-53. "We look for ... the Lord Jesus Christ: Who shall change our vile body, that it may be fashioned like unto his glorious body." Philippians 3:20, 21.
4. He will not touch the earth at His second Coming!
Note that Jesus does not touch the earth at His second coming. The saints meet Him "in the air." So God's people will ignore any report that Christ is in Baltimore, New Orleans, Los Angeles, etc. False christs will appear and do miracles on the earth (Matthew 24:23-27), but Jesus will remain in the clouds above the earth at His second coming.
You are right.recognising Christ can`t be how he looks for we have no pictures, but it can be how it is descibed, His actions on His arrival in the heavens, the ressurection, His commanding vice to raise the dead to life, and the sheer glory!
Yes there will be major disagreements between the various denominations as to whether its really Christ or not if they don`t know the signs of the real Christ! The great deceiver is known by Christians as Satan, will immitate Christ, he will be seen performing miracles all over the world and many will fal for the hype! Muslims will see him as Isa, Christians wil see him as Christ, and Jews will see him as the long awaited for Messiah! He could even bring peace and safety in the world for a short period because the world will experience great tribulation prior to his arrival! He could heal, and perform great feits.
He will be all things to all men! But he will not be the true Christ.
Only those who recognise the signs of the false Christ will continue to look for the signs of the coming of Jesus in the Heavens. Then won`t the world get a shock if they are looking in the opposite direction at the counterfeit.
Its all very dramatic but thats exactly how its gonna pan out.
I have heaps more details if you wish to ask further. :)
SDA life time of study of the second coming of Jesus.