That is where the concept of taking the word back from the oppressor comes from. For example a racist white person calls a black person a "******" and the black persons responds with " Oh, you wanna see a nikka, I'll show you a nikka" and proceeds to bestow a beatdown on racist white person. Another example or analogy is the word bytch and how women use it amongst themselves and how it is different when used by men towards them.I've heard black people when they get mad and some of them use the er word at other blacks in those situations.
If you want to blame something or get mad at anything it should be mainstream rap. Every damn rap song has the word in it. And it's not used in an offensive or prejudicial way.
"All a my (word) say blood, all a my (word) say cuz)"
"And we hate popo, wanna kill us dead in the streets fo sho (word)"
"My (word) my (word), my (word) my (word), my motherfukking (word)"
It's been normalized, and I understand the anger when someone says the er version.
I'm not buying the whole brother/brotha logic. Why would any African American use that word towards each other if it was a devil white mans word?