>>512518126 (OP)Catholicism superimposed saints and their festivals on pre-Christian rituals, deities and religions. John the Baptist = Perun, Mary = Allmother/Mokosh, etc...
Also during renaissance popes went back to Roman art and used funds from Ottoman's for holding captive sultan's brother and not releasing him to contest the throne to build and paint Sixtine Chapel. Masses were in latin and most people didn't read the bible.
Luther saw this as bad and stripped Christianity of all additions and went back to bible, which for the most part is Judaism (Old Testament is nearly 1:1 Tankh, new testament is Jesus arguing with Pharisees on Judaism).
Since Protestants had only Jewish source material left, they aligned with it more. The most extreme Protestants were exported to USA and they love Jews the most.