Over the centuries, hatred of Jews has come from many directions. The latest wave appears linked to progressive opposition to Israel’s treatment of Palestinians, according to a study done by Arie Perliger, director of security studies at the University of Massachusetts, Lowell. All Jews must bear the guilt, the thinking goes.

By failing to condemn antisemitism, politicians, academics and their media allies are doing our enemies’ bidding. One week ago, ISIS released a 67-minute diatribe calling for the destruction of Jews worldwide to avenge Israeli strikes against Gaza. The message was “kill them wherever you find them.”

Meanwhile, Jewish families privately talk at the dinner table about Anne Frank, hiding in attics, and where this new wave of antisemitism could lead.

It’s time for all Americans to denounce it.