I think the expressions of anti-semitism has been vandalism, verbal abuse, security at school (given schools and synagogues have been attacked elsewhere). I don’t think the average pro Palestinian protesters are suffering that kind of harrassment, not sure any schools have had to get security in or paint thrown on their walls etc.
I think it should be pretty easy to condemn anti-semitism as appalling in the same way we would condemn islamaphobia. If you find yourself trying to justify either you are suffering from moral rot.