Stupid things religious people say

[Angrboda]

What about an inference from classical times when even Jews were enslaved.  It sounds like you're saying the church had no counterexamples, but they did.

I believe Jews fall into the category of non-Christians.

The point is that societies which practiced slavery did not view slavery as immoral.

Boru

The idea that they had no questions because they thought they were subhuman is a stretch. The church thought they were suitable for conversion, so there's an obvious inconsistency in writing them off as subhuman.