Yours is a fallacious argument because you ignore any possibilty for what you perceive to be antisemitism as stemming at least in some part from Israel's actions since 1967. If Jewry had not been involved in the occupation of another people, would sentiment at the UN be different. The truth is that neither of us can know the answer to that, because one cnnot create a false history.
Amnesty: Israel's 'Black Friday' Gaza strike a war crime (Haaretz)
from the article: The UN is ripe for advancing the Palestinian agenda