I dunno how much to chalk up the slurs etc to being Redditors in a sub for the supreme shit poster, but for a real answer for the casual antisemitism I've seen from a few people I know in the past couple years. You have to gently explain that the Jewish population that's against having a settler colonial ethno-state do not get any media coverage and it's easy to see the amplified voices of the Zios being indicative of the opinions of the whole.