"You're a meshugana!" is an ancient and much beloved insult between Jews. I see absolutely no anti-Semitic connotation in "crazy Jew." On the contrary, the anti-Semite portrays us as brilliant - devious and scheming - but still brilliant.
I know lots of crazy Jews. I know lots of crazy everybody.
8-) Words I learned from my Jewish neighbors, in descending order of usage (pardon the spelling): tuchus, schmuck, schikzah, schtup. Fond memories.
If you're going to talk about me, you could at least ping me. :^D