Yeah, when I watched it the first time, I noticed that Fajo looked and talked somewhat like a Jewish merchant stereotype. But then a lot of Jews have fun playing the stereotypical Jew, so I never gave it much thought.
Do they enjoy it, or is it the only role a short, curly haired guy with a large nose and bushy eyebrows can get? I mean, talking about the actor's other TV roles, he gets to be a lawyer - A LOT. It's like a black guy who is only offered roles as criminals.
The skull cap is what bugged me at first, but the clincher was the water supply poisoning. Just check this article for some historical context: http://en.wikipedia.org/wiki/Well_poisoning . When you have so many "coincidences" it gets to seem either blindly dumb or suspicious.
That's what I meant by 1+1+1+1=4. Little, swarthy greedy guy is an unavoidable (if annoying) collective unconscious symbol. But a swarthy greedy guy with a skull cap, being a nebbish, and poisoning a well... that starts pushing the line just a bit. Just a bit. I apologize if pointing this out makes people uncomfortable.