Israel has a perverse incentive to not strongly resist antisemitism. Part of its national sales pitch is that it's the only safe place for Jews. The existence of Jewish communities outside of Israel that are frankly much safer than that being led by the sorts of people leading Israel flies in the face of the pitch. Rising antisemitism in our own countries rebalances the risk in that equation more towards Israel's favour.

They're counting on it to drive more Jews to move to the "safety" of Israel.

They were granted a get out of jail free card, for a long time.
I made a comment on a German forum about how horrible Israel has been and it got taken down per German anti-antisemitic laws.

Aren't Israelis the worst an it Semites.