In this respect, it's certainly not less "racist" than any other continent's history.
If you by racism means tribal or national sentiment to live together with others from the same tribe or nation. Then yes, what you call "racism" shaped it everywhere. I would hesitate to call it racism however, as it seems to be a universal human trait.
In United States, it would be cleansing of land from natives and rhetoric around it. It would be rhetoric of slavery and later Jim crow and so on. In Europe it would be very eacial ideology of Nazi and previously pogroms and relationships against Jews. In Africa, I am pretty sure colonial history applies. In Asia, check out Rwanda for genocide or Japan for general racism.
I missed Africa, because I never really read much about any part of their history, unlike Europe, United States and Rwanda. Not sure why that would be issue.
Europe had pogroms before it had WWII. United States were racially legally segregated long after WWII. The Asian history does not lack racism either.