Answer:
The muslims invaded Spain and in the southern regions, new words with arab ethymologies appeared, they spread their culture and their race. The mix between spaniards and muslims was called a moore, the arab genes still persist in Spain, and the arab ethymologies are present nowadays on the spanish language.
The muslims also tried to impose the islam religion to the catholics, but in 1492, the spanish crown expelled the muslims and the jews from Spain.