Bull. I don't see where it is considered acceptable for women to call other women c*nt. It IS however acceptable for blacks to call other blacks ******. It is not acceptable for WHITES to call blacks ******.
It's acceptable to call whites, honky, cracker, trailer trash, guero, gringo ... it's fine to stereotype whites and make fun of the way they dance, walk ... it's fine to try and hold whites accountable for slavery even though it was abolished 143 years ago, long before any of us were born ... it's fine to blame all racism on whites while turning a blind eye to the fact that it's as bad or worse within ethnic minority groups.
In other words, attempting to correlate your racist double standard to a word that is not acceptable at any level in any circle except the gutter isn't cutting it.