I know there are probably rare exceptions but i don't see what's so hard about finding a woman the same race as you. It should make it even easier if you're Pro black. No matter how down for the cause a white woman is i can't imagine being in a long term relationship with 1. Sooner or later she'd get sick of the amount of shyt i be talking about cacs on a daily basis. Not to mention having to deal with her family. Guaranteed to be at least 1 racist somewhere in there.
Edit: also this only applies to serious relationships imo. I could give a fuk who a breh chooses to fuk. I'm sure there are some genuine Pro black brehs that like to fuk white bytches but will still reserve serious relationships for a black woman.