Interestingly Benjamin Graham, Warren Buffett's mentor had a similar problem, he was Jewish and none of the firms on Wall Street would hire a Jew, so he had to start his own firm.
http://www.buffettsecrets.com/benjamin-graham-biography.htm
Somehow I suspect if you said something like,
"Enrico Caruso was Italian, and so couldn't find a job since none of the opera houses would hire an Italian..."
...the bullshit detectors would have tripped more readily.
Fyi, Jews have been prominent in finance since Joseph, at least.
"Benjamin Graham was born Benjamin Grossbaum in London, England[1] to Jewish parents.[2] He moved to New York City with his family when he was one year old. After the death of his father and experiencing poverty, he became a good student, graduating from Columbia, as salutatorian of his class, at the age of 20. He received an invitation for employment as an instructor in English, Mathematics, and Philosophy, but took a job on Wall Street eventually starting the Graham-Newman Partnership."