[InitialLastName]

Sure, but in a world dominated by the Christian church, isn't it possible that the discrimination was based more on religion than on race?

I don't remember where (help me, please!) but I read an account by a medieval European monk visiting monasteries and Christian communities in Africa. He described their religious practices, traditions, culture architecture and food in great detail, but mentioned their (certainly much darker) skin tones only in passing.

"Race" (boiled down to skin melanin contents) as a distinguishing point between groups of people is not a permanent fixture in human history. It is especially overwhelmed by religion, language and culture/tribal nationality in terms of its use as a dividing point between "us" and "them".

[gdhbcc]

Depends on the place I suppose. In Portugal it was primarily because of religion (many time out of fear that they had secretly kept their Jewish religion, rather than actually converting to christianity).

It doesn't really make sense to talk about the expulsions in the 1500s as being motivated by race, given that there was no meaningful difference in race between the Jewish and Christian populations in the area, and they had widely intermingled.

While I have read plenty of accounts of riots and expulsions that either explicitly or implicitly state their reasons as being motivated by fears of new Christians still Secretly practicing Judaism, I haven't seen a single account naming race or some ethnic distinction as the cause.