There’s an association between Jews and finance that goes back a thousand years into European history. The natural strife between creditors and debtors made moneylending an extremely unpopular profession, so much so that the Third Council of Lateran in 1179 threatened Christians with excommunication if they lent money at interest—expanding a 4th century prohibition against usury. Jews were exempt from this threat—and prohibited from most other trades—and so Jewish communities in Europe filled this loathed-but-needed economic niche.
The union of ongoing bigotry with intense financial resentment laid the foundation for a permanent form of anti-Semitism in the Western world. The massacres of Jews by Crusaders in the 11th century dovetails with conspiracy theories about the 2008 financial crash.
These intense associations between Jews and financial trades permeate modern pop culture as well, so much so that even works by Jewish or philo-Semitic creators still reflect some of these old elements, whether or not they carry the hostility. These can be physical:
Long, hooked nose, sunken eyes, payot (sidelocks), swarthy or sallow skin, all connoted a malevolent, alien intruder to European society. Personally, Jews were portrayed as conniving, greedy, and fundamentally untrustworthy. Moreover, they were capable of corrupting innocent Christians, bribing them or otherwise rendering them financially subservient. Corruption carried a sexual element as well, arousing particular fears. We can see a number of these stereotypes in today’s pop culture.