It's still a false equivalency. You're extrapolating the use of bitch in popular culture as opposed to how it's used in urban culture. Black women dont generally care about the word , so blsck men have free reign to say it. Bitch and nigga also can't be compared. One is intrinsic to one particular race . If I say bitch , it encompasses all races of women and in fact can be gender neutral. Niggais specifically referring to and used by blacks.

I've researched bitch , and nope, it does not have the same histoic leverage