It might not be the most substantive comment ever made. But by now it is about as classic as the Stephen Colbert quote ”reality has a well-known liberal bias”, and I bet you would not consider that quote hateful near-bannable offence, versus Republicans, right? It follows the exact pattern, and has a similar connotation. There is a large contingency in power in Israel and the west who loudly considers the truth to be antisemitism. Therefore we have a duty (BECAUSE ALL OTHER WAYS HAVE CLEARLY FAILED) as human beings to mock them. And what better way to mock them (like a court jester) than to use their words against them?