You might just say that Christians, in particular, the Lutherans were awful pikers and sought to use antisemitism over paying their debts
Pikers... LOL.
You know when I consider the psychology of the average human beings I have come into contact with, the reason for all this grief for Jews could be as simple as their being successful.
I read example after example where Jews show up in a new land with nothing, and become successful.
Nothing generates as much hate as success, in those that do not have it.
In addition, nothing shows you where you stand, or what you are, as well as another persons success in an area you have none.
If a person works their whole life in a town, and one day a man shows up with nothing, then 10 years later owns a profitable business, and a home, and the life long townie still has nothing...
Imagine what a weak person might conjure in their minds to absolve themselves of their failure and explain the others success.
We even have a contemporary saying for this: "haters gunna hate".