This is a booby trap. Instinctively I know that the majority of these cases will be bogus but merely questioning it invites acusations of antisemitism which I know from experience. What I cannot question is the fear these numbers instill in Jewish communities, a flame I don't wish to fan.
Among the most unforgivable things Israel has done is wear the star of David at the UN. This is a replica of what the Nazis did and singles out Jews for hatred.
This article is so on point I will use it as a reference.