There are plenty of examples. But I'll settle for the Armenian genocide, and the term slave has its origins in the word slav. The slavs, who inhabited a large part of Eastern Europe, were taken as slaves by the Muslims of Spain during the ninth century AD. Then let's mention groups. You think every other race in its entirety suffered? No, it was only small groups. The majority of the race was not subject to the crimes. Every crime has been done by humanity as a whole. No race is free from it.