I picked genetics. In my defense, I'm a hereditarian and I have it in me to think like that (wait, is that circular?). I think Jewish tricks stem ultimately from clannishness (hbdchick.wordpress.com).
A lot of inbreeding naturally makes average Ashkenazim (I'm not sure about the other kinds, but you probably didn't mean them) have a lower opinion of non-Ashkenazim, enough to make slurs about them (Goyishe kop/ goy head/ idiot).
This doesn't make Jews nice to each other though. Look at Jewish feminists and you'll find a good portion have overbearing dads/ dads who prefer sons. They have a tendency their internal conflicts into critique of external gentile society due to this clannishness (which I think deserves some measure of pity still, they are suffering after all).
I'm just going to speculate on the sexual deviancy and say that I imagine most people capable of being super rich probably have a rather deviant psychology. That's just a wild guess though.
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