PC: Could Dum Diversas starts a new crusade?

He is referring to Pope Nicholas V.

Basically, he granted Portugal and Spain a blank check against the Muslims to do as they wish, up to the point of sanctioning putting such persons as the Saracens into slavery.

What the OP I think is getting at is what would happen is Spain and Portugal launched a Crusade through the remainder of Iberia and into Northern Africa.
 
it could yes, but im not sure how much spain and portugal would work together.
Maybe just an earlier (and less grand) scramble for africa between the two.
This is interesting though
 
I just wanted to gather opinions on whether or not it was a bit reaching. If a full blown crusade is too much, what about the papal bull leading to large scale slave raids by Europeans on North Africa and the Near East?
 
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