I think you can be against Israel's current policies and remain not anti-semitic. But many Jewish people I ahve debated with do not. To be against Israel means you are an anti-semite, whether you acnowledge it or not!!
I think Judaism, like any other religion, has its extrmeist side, many who seem to be American Jews, ironically, as they do not actually have to live through the conflict.
When we lived in Israel it was terrible to see how the Pals lived. Many Israelis suported them, but we came across many who treated them as lesser than dogs(their words).
The US Jews I have talked with feel that the Palestianians are not a real people, therefore do not warrant a country. They feel that the Arabs have enough land in the area to home the Pals, so why should Israel allow them part of its small piece of territory.
(PS, I am using my id from elsewhere now, as those who know Gwen will have worked out it was me as Ocean!! I wanted to use a new name here as I did not want to be pre-judged, but prefer Amunette really as I use it most places)