Wildly innacurate perspective apart: even in the most multicultural cities in the world, I can guarantee you that you dont have to run far to meet different people and learn new things. You probably didnt try much though, too keen on googling things that exceed your apparently extreme intellect.
Other countries dont exist just for the sake of you broadening your horizon kiddo, history is created by people interlocking together, weaving new stories.
I'm pretty sure you just now imagined a white woman and a black man having sex and was horrified at the prospect
You dont like the current human history? It doesnt change one thing, your revulsion became part of it the moment you felt it.
The only thing you can change is how you act in this story, and for the moment you are just a mildly deranged internet warrior, as far as I can see. I hope this is not all there is to it, for your own sake!