I heard this on an audio, but forget where. I dug this up from wiki for those quick to believe the jews-run – the – world – psyop.
Among socio-economic factors were restrictions by the authorities. Local rulers and church officials closed many professions to the Jews, pushing them into marginal occupations considered socially inferior, such as tax and rent collecting and moneylending, tolerated them as a 220;necessary evil”. Catholic doctrine of the time held that lending money for interest was a sin, and forbidden to Christians. Not being subject to this restriction, Jews dominated this business. The Torah and later sections of the Hebrew Bible criticise usury but interpretations of the Biblical prohibition vary (the only time Jesus used violence was against money changers taking a toll to enter temple). Since few other occupations were open to them, Jews were motivated to take up money lending. This was said to show Jews were insolent, greedy, usurers, and subsequently led to many negative stereotypes and propaganda. Natural tensions between creditors (typically Jews) and debtors (typically Christians) were added to social, political, religious, and economic strains. Peasants who were forced to pay their taxes to Jews could personify them as the people taking their earnings while remaining loyal to the lords on whose behalf the Jews worked.