sk5t's comment was: "My perception is that Zionists are a very powerful special interest group." Which strikes me as a calm, rational opinion. (Whether or not you or I agree with it is another matter...)
The American right tends to be supportive of Israel. The American left is slightly more split, but since American Jews tend to be left-wing they exert enough of an influence on the rest. This doesn't tend to be as true in Europe, where anti-semitism never went fully out of fashion.
(This, of course, assumes that by antisemitism you mean actual hatred of Jews, and not "being critical of the something the Israeli government does or did")
Well, for example, there's being critical of something the Israeli government does or did, and then there's literally calling them Nazis.
There's also that charming little incident in your country where football supporters, specifically of Ajax, took on a "Jewish" identity for some reason, which was cute until rival supporters chanted "Hamas, Hamas, Jews to the gas". Oddly enough, this kind of racist abuse doesn't seem to happen in the United States. http://query.nytimes.com/gst/fullpage.html?res=9404E7DB153FF...
Fair point though about the football supporters. Their behaviour show the worst in any people. That said, if Ajax had happened to be associated with Catholics instead of Jews, the rival supporters would've come up with something horribly offensive to Catholics. So I'm not sure that this was real decent antisemitism: more like a very inappropriate form of anti-Ajaxism.
In fact, the way I understand that incident, it's much like using the term "Nazi" to criticize the Israeli governmen. I don't see how that's antisemitic, but it's still ridiculously offensive. When I wrote that, I lowered myself to the standards of mindless hooligans.
-- Anti-semitism is rampant: In the UK, France, and Germany, etc. Its quite possibly, even trendy. [1,2,3]
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[1] How my hate-filled family spawned Merah the monster
http://www.independent.co.uk/news/world/europe/how-my-hatefi...
[M. Merah murdered seven people, including three Jewish <children>, in a series of scooter-borne attacks in the Toulouse area in March 2012.]
http://www.independent.co.uk/news/world/europe/how-my-hatefi...
[2] 'One in six' east Germans think like neo-Nazis
Published: 12 Nov 12 15:51 CET
http://www.thelocal.de/national/20121112-46121.html
[3] Anti-Israel culture war of British liberal elites is not a grassroots movement Too many of our leading British academic and cultural institutions are in the thrall of left-wing activists, but anti-Semitism is far from rife at the British grassroots
http://www.thecommentator.com/article/1381/anti_israel_cultu...
[4] "There is in England a saying that an anti-Semite is someone who hates the Jews more than is necessary." - 2010. Y. Rabim, Nobel Laureate.
See http://www.patrobertson.com/Speeches/IsraelLauder.asp for their own words, and http://www.lewrockwell.com/orig/north7.html for an non-evangelical viewpoint.