AITAH for thinking my boyfriends best friend is weird?

So, today my boyfriend and I got into an argument. This is so stupid but I genuinely need to know if I’m being weird and acting like a “white savior” or whatever.

To preface this my boyfriend, his friend, and I are all white. Also, I have never really liked this friend of his.

So today I open roblox, and see a friend of his with a username I don’t recognize with a black avatar, that’s wearing a black ski mask, has locs, a durag, and tattoos. I ask him “who’s this?” and he says “Oh, that’s ‘Kevin’” who is one of my boyfriends best friends. I’m staring at this character and think, this isn’t the first time I’ve seen “Kevin” have a profile picture, avatar, etc who is a stereotypical black man. I also notice that whenever Kevin sends a meme in a group chat it’s of black men, naked black men, gay black men, etc.

So I ask him “Why does Kevin have a black avatar?” and he says “I don’t know, he was being silly” and I ask him why having a stereotypical black man as his avatar was silly or funny. He shrugs and says he didn’t think too much of it. I say “don’t you think it’s super weird that all of his avatars and profile pictures are black men” and he repeats what he said.

We go back and forth for a bit and the argument gets kind of heated. I think this is VERY weird, and have never seen this kind of behavior from someone.

Maybe this is juvenile and stupid, but this is one of many things that really irks me about Kevin.