That's not even going into their de facto slavery with foreign construction workers, environmental damage, and sexism.
I'm 6 ft 6 and I have a blonde wife who's just a bit smaller. Even though we behaved very polite and dressed like locals it was like we had a big target on our backs and were looked upon with resentment everywhere we went.
I will not mention the countries we visited but it was pretty much the same everywhere.
They might have been lucky, though. A moroccan women who also hitchhiked a lot just stated, the closer to mauretania, the more rape attempts.