I'm not sure the incident you're referring to - I don't use Twitter - but I'll assume you're correct. Okay... Trump let someone else say "White Power"... ergo, he's racist. I'm fine with that.
Biden, literally said "ni**er" in the context of school integration (he was against it, by the way), said it several more times in other senate hearings, says it when he's having his sunsetting fits abroad and believes my community is a monolith (we all act, talk and think alike)… so much so that I, according to him, am not black if I didn't vote for him. And this racism of low-expectations combined with his white savior complex isn't limited to Americans who are black! Latinos, Arabs, Indians... if you're black/brown, Biden wants to fix your problems specifically because you're too lazy, poor and stupid to do so on your own.
And his family is as well? I think the Hodge twins made a video about Hunter and his tweets on YouTube, if that's what you mean. They didn't seem racist as much as they were a fine example of someone trying desperately to cling to rap culture to appear cool. Maybe that falls into the category of "cultural appropriation", if you're into such a nauseating concept. But I'm happy to call him racist too I suppose.
So... I guess they're all racist then, huh? I mean... one clearly more than the others but I'm comfortable with all being called such if the bar is that low.
By the way... if you're going to say a word, just say the word... and then deal with the consequences. This hyphenated/abbreviated crap white people do is insulting to us and looks cowardly for them. Say what you want to say and accept your ass whooping like things used to be.