Interesting question. I think the answer is multi-faceted. From an international politics point of view, devoid of any ethical considerations, arab countries have oil and Israel does not. Oil is important for western countries, so some concessions in their international policy are made to appease the oil providers. Kinda like heroin. On top of that, many people always like the underdog and see the stronger party as oppressers. We as humans apparently see a nobility in struggle against a stronger foe. The movie 300 was successful for just that reason; 300 vs a mighty horde, of course we're rooting for the little guys. Further, I think Europe in general has never gotten over its anti-semitism. Even England- probably the least European country- has politicians who randomly decide to libel the Jews, and the courts don't really care. I think many people have transfered their hate for Jews to hate for Israel, which is socially accepted (I am not saying all critics of Israel are anti-semites, but some of them definitely are). I think Europeans also attempt to alleviate their collective guilt for the holocaust (I hope they feel guilt) by portraying the Jews as Nazis. Then they can say "sure we did that, but look they're doing it too when they get the chance". That's Europe. The arab world of course feels nothing but dislike for Israel, but I think from more than just blind hate. All the countries side with the Palestinians (though it is interesting to note that none of them do anything to help them, just side with them) of course, for ideological reasons. Palestinians= arab/muslims, Israel=Jews. I think also many of these countries feels resentful at what Israel has accomplished; despite not having oil, being tiny and constantly fighting to defend itself, Israel has managed to build a thriving vibrant economy, institute (real) democracy and human rights and in general give a good life to its citizens. The life rate is above 80 years, literacy approaching 99% - it's a good place to live. While at the same time, those arab countries who are wealthy off of oil sales and have been around much longer and haven't had to fight a battle in who knows how many years can claim none of those things. Plus there's the collective anger at their impotence with regards wiping Israel off the map.