Actually, mocking any distinct foreign or seemingly alien non-integrated group is a part of the human tradition. Everyone does it. We're hardwired to be suspicious of strangers.
Personally, I think Toim Lehrer summed it up the best in his song "National Brotherhood Week":
Oh, the Protestants hate the Catholics,
And the Catholics hate the Protestants,
And the Hindus hate the Moslems,
And everybody hates the Jews.