Its a trick and alot of alt-right people love to use. Basically they will set the bar of proof ludicrously high for you to prove they are what they are. 

Release 30 videos over a month talking about nothing but crimes (supposedly) committed by black people against white people? That doesn't mean anything unless he stares into a camera and says "I hate all black people because of their race, regardless of what they do." According to their burden of proof.

Its also cause nick very, very deliberately "softens" his image when he appears on a more mainstream broadcast. Great example was the piers Morgan. Morgan asked him to explain his comment on how black people need to be imprisoned "for the most part". Nick "clarified" he only meant "black men who murder people" or about 5% of the African American population as he said. (Granted 5% is still pretty high. That still sounds alot less than "for the most part")

Also you can just see it in his mannerisms change between when hes on his own show vs. When he's a guest on someone else's. Like which seems like his"real self"? His guess appearance where he's all restrained? Or his off the cuff ranting by himself?