Moslems and Christians swapped principalities back and forth and were loathe to do more than allow Jews into the castle to read and write stuff for them.
You’ve boiled a 1,000 years of history into that statement? Jews were administrators of whole provinces for absentee Muslim overlords in some cases, persecuted by moslems in others. I think there is massive ignorance of a very long history and snap judgments are made on extraordinarily limited facts. Basically, it’s polemics; trolls and the ignorant throw out some fact that supports some prejudice that they have.