[Mercat]

No cites for you but the Arabs were quite comfortable with slavery and pursued it long after it had been outlawed in England. I don't know whether your friend considers Arabs to be "white."

Certainly the Portuguese were trafficking in slavery as long as there was a market to do so. Again, and I have no idea, are Portuguese "white"? I'm sure they think that they are but probably Jesse Jackson would consider them to be Latinos and therefore oppressed victims of northern Europeans. Native Americans, especially in the Northwest, had slaves. It's been a pretty common circumstance in most cultures for millineum. Good luck.

[lepton]

When the Aztecs were conquered, the Spanish took their empire with a force of only 500 men. How'd they do that? The freed the huge nuymbers of slaves along the way, and so Mexico City was hit with a force of around 4 million freed slaves.