Any criticism of the Israeli government, no matter how milquetoast, gets called anti-semitic by defenders, folks shouldn’t be shocked when people shrug after a while, say, “guess I’m anti-semitic now”, and really let loose.

Uh, except for the bit where ‘letting loose’ is ‘revealing that they actually are antisemitic’. I generally assume that people, and especially left-leaning people, aren’t antisemitic even if Israel critiques them as such; to find out that a very nonzero amount actually are, and a much larger amount are willing to endorse or tolerate those antisemitic views, is deeply disturbing.