Liberal antisemitism usually runs in the direction of graciously affording Jewish liberals the opportunity to denounce Israel. It’s a loyalty test. If they pass it, then all is good, so long as they’re willing not be too Jewish in the presence of the real liberals. You also have to be willing to deny your status as a minority, since Jews - who are basically just white people as far as they’re concerned - are oppressors and not the oppressed. And you always, always have to be willing to denounce Israel on command.
What’s wild is that American liberals have made amazing strides in forwarding understanding of systemic racism, implicit bias, and privilege. We accept that confronting these things can be deeply uncomfortable because they require changing beliefs you were taught through societal inertia. But those lessons are generally not applied to liberal antisemitism, because one of its aspects is that Jews are white oppressors rather than members of an oppressed minority.