Speaking of laws in Europe used to target certain groups of people, no people were targeted directly by laws as the Jewish people. No other people has encountered the level of hatred than the Jewish people. Everything that was done to them during the Holocaust had been done to them centuries prior. This includes the Jewish ghettos, having to wear special dress to make it easy to identify them, kicking them out of entire countries, rounding them up and killing them in mass, etc. In fact, you could say that the Holocaust was just a natural climax of the oppression.
So the question begs, why do the Jewish people consistently rank socioeconomically at the top no matter what country they live in and no matter how much oppression comes their way?
I'll give you a hint, it's not because over half the Jewish families are run by teenage mothers.