Most Jews never were rich or powerful. Ninety percent of Jews have lived in poverty throughout modern history.

When Jews were a nation with a territory, they perpetrated their own massacres (read your Bible).

As soon as they lost it and were dispersed, they became everyone's favourite butt of contempt, for whatever reason best suited the moment.

And because Jews stuck doggedly to their religion, their rituals and their tradition of (intellectual) learning, they were the only minority about whose deviousness both the elites and underclasses could always concur.