Possibly the most pathetic display of racism ever.

[Philippus Flavius Homovallumus]

So............

The Jews did control the world....?

No, they were deicides and often political dissidents. No one thought they controlled the world in 1300, they thought they killed children. Whether that was true or not is an entirely different issue.

What is true is that by refusing to even superficially convert they placed themselves outside of society.