The problem is that he constantly intersperses incoherent ramblings and paranoid delusions with whatever valid and on-topic points he makes. I think that's the

The problem is that he constantly intersperses incoherent ramblings and paranoid delusions with whatever valid and on-topic points he makes. I think that's the primary reason, not the use of the word "nigger". Actually, his use of it is directly related to the delusional rambling, rather than be a stand-alone point.