>>17777903
The Catholic church and Catholic monarchs created the Court Jew to work for them as their financial agents. By banning "usury" to the goyim they ensured future monopolies for the Jews.

>Prohibited from nearly every other trade, some Jews began to occupy an economic niche as moneylenders in the Middle Ages. Only they were allowed to take interest on loans, since—while the Church condemned usury universally—canon law was only applied to Christians and not to Jews. Eventually, a sizable sector of the Jewish community were engaged in financial occupations, and the community was a financially highly successful part of the medieval economy.[3][4] The religious restrictions on moneylending had inadvertently created a source of monopoly rents, causing profits associated with moneylending to be higher than they otherwise would have been.[5] By most parameters, the standard of living of the Jewish community in Early Medieval period was at least equal to that of the lower nobility.[6]
https://en.wikipedia.org/wiki/Court_Jew

>The Church forbade Christians to be usurers, so the Jews secured the remunerative monopoly of money-lending. This decree caused a mixed reaction of people in general in the Frankish empire (including Germany) to the Jews: Jewish people were sought everywhere, as well as avoided. This ambivalence about Jews occurred because their capital was indispensable, while their business was viewed as disreputable. This curious combination of circumstances increased Jewish influence and Jews went about the country freely, settling also in the eastern portions. Aside from Cologne, the earliest communities were established in Mainz, Worms, Speyer, and Regensburg.[15]
https://en.wikipedia.org/wiki/History_of_the_Jews_in_Germany#From_Rome_to_the_Crusades