[throw_a_grenade]

What he did isn't antisemitism, and neither it was arguing against right to exist of State of Israel. It was disagreement with Israeli government, and that's perfectly fine. One might even agree with that criticism given the number of Palestinian women and children killed by Israel at the time.

Let me repeat this, because it seems warranted: criticism of Israeli government (its policy and actions) isn't antisemitism, and isn't calling for Israel to cease existence. Mixing those two is especially dangerous, because this would lead to conclusion that periodically killing 1500 unarmed Palestinian civilians is a necessary price to be paid for continuing Israel's existence, and further discussion if this is a price worth paying.