Adam Sandler starred in hit movies, and that's how any actor makes it. Do you think there's no other Jewish actors out there? Chris Farley was the same way, and he's Irish.

Some families may have leftover benefits from the mafia, and some Jews were in that business. Also Jews have historically been less restricted than Christians when it comes to business, so in the old days they could rack up fortunes much more easily. And most of the non-Jews in Europe and America were Christians. That's probably why a disproportionate number of Jewish families have huge family fortunes, and once you're already at the top it's usually not too hard to stay there.