“Antisemitism used to mean “someone who doesn’t like Jews,” but nowadays it means “someone that Jews don’t like for some reason or another.” The deliberate trick here is to make you think there is something wrong not with the Jewish baby killers, liars, or scum who are doing bad things but with the person noticing and reacting to the bad things these miscreants are doing.”
A nonsense term that has had plenty of marketing applied to it over the ages.