@shortstories Christianity doesn't promote Orthodox Judaism specifically, it promotes Israel and Jews, which were already a thing.
If you wanted to create a slave class, you don't teach them your religion. Instead, you give them a new prophet that represents all that is weak, for them to follow.
Regardless of the how and the why, there is no denying that Christianity promotes slave morality and Jewish subservience. There has been no movement more successfully pro-Jewish than Christianity.