Anti-Semitism is growing in places like France and Great Britain. A new factor is that today some voters are Muslims. Politicians seek votes. People take sides in the Israeli-Palestinian stalemate, as if one side has a monopoly on virtue. Authoritarian (neo-Nazi) politicians have been winning elections in Europe. Jews are under attack from the Left and the Right, even in Asia.
Israel, by continuing to take land from Muslims, feeds anti-Semitism. Palestinian terrorists continue to kill Israelis randomly.
In this country we have Christian Zionists, unshakable supporters of President tRump. The President has argued that Nazis are, in some cases, “good people.” Anti-Semites and Christian Zionists both vote for tRump, parts of his base.
The Internet has a role in the United States. It supports a partly hidden network of nutters who encourage one another to murder Jews.