"....it's very clear that neither MtheGM, Jim Carrol or Keith are racists or anti-semites or anything of the kind."

According to who's definitions?

Many in the Jewish community consider the equating of Israel's actions with that of the Nazis as anti-semitic. They also regard attacks against "the Zionists", the "state of Israel", "the government" etc. as thinly disguised substitutes for attacks against "the Jews".

I would suggest that you do some research into "the new Anti-Semitism" to inform yourself of how the Jewish community defines it, not how some loud mouth bigots on a forum do.