Not so much asking you as asking a rhetorical question.
Not sure speech community isn’t more of a linguistic categorisation than a racial one.

Wouldn't know about Eminem using it, I don't listen to his music. But he shouldn't.

And no, that isn't the definition of racism. Treating someone differently because of the colour of their skin isn't racist, showing prejudice against someone for their skin colour, is.

I'd ask again for those asking "why can't I say it?", Why they would want to? It's a highly derogatory word used in the past to dehumanise black people and a discussion far more historically complex for discussion on a football forum.

There is a difference between the "-a" and "-er" variants

Nothing you say makes sense, but you're deflecting your own racism. All I've done is question why a white person would want to use a derogatory term for a black person but the only answer I receive is "whataboutery".

Racism isn't treating someone differently because of race, it's being prejudiced against them because of their race. If for example, I went into a European barber shop, they'd send me across to another barber who could cut my hair. Not racist in the slightest but would be by your own, confused definition of racism.

Is your first name Hrolf?

I could write a list if you liked but would that make you think about things differently?