The questions Biden needs to answer on Tuesday are not questions about beliefs or values. They are not questions about himself or his personal commitments. They are questions about American liberalism in general, about its ability to defend its stated commitments against challengers who plead victimhood as their justification. Biden hit a lot of the right themes in informal remarks at the White House yesterday. But there’s more to say, and it should be said clearly and without any Trumpian caveats about “good people on both sides.” ...

Most American Jews accept that mainstream U.S. liberals like Biden reject both variants of anti-Semitism. But very observably, mainstream American liberalism is a lot more comfortable standing up to the Greene version than the Omar one.

This disparity explains why the campus anti-Israel protests have so alarmed many American Jews.