And yet people do regularly and publicly.
Even the lefties and the so called "Secularists" who are not supposedly on the right. There are anti-Jewish movements here based around issues such as Israel (with some justification), kosher slaughtering methods as animal abuse and saying that circumcision is baby abuse.
Check out some of the anti-religion Facebook groups (if you're on there). They go on about the Old Testament and Jewish religious practices all the time.
I remember going to some meeting at university years ago, with the usual Trotskyites turning up. The speaker was with Palestinian Solidarity or some group like that and kept using the phrase "the Jews". It was very noticeable that he wasn't parsing Israeli government policy from Jews in general. (Not all of whom support the state of Israel or live there).