Aye, this is a huge problem. It's why I don't support trash like South Park. People can always say the context is king, but at the end of the day there are millions of young kids/teenagers that watch that show freely and are influenced by the racist jokes in the show. I find it crazy how it gets a free pass from so many people on here while the PewDiePie stuff was a pitch forks moment. Part of the issue we have is that many people are so selective with what they deem as racist.
Because south park and often other professional comedians often construct their jokes, condemning said things. South Park ain't perfect by any means but to compare it to the off the cuff ramblings of some youtube personality who's comedic talents are armature at best is kind of really underselling their actual comedic writing prowess.
I also don't subscribe to the notion that because someone makes an off color joke about something its immediately worry some to watch. One of my favorite comic to show transitions are the boondocks. They make plenty of really bad jokes , that I at full admittance watched way before I was supposed to .I think i was like 12 when the boondocks originally came out on TV.
The difference between south park/ The boondocks and PDP or any minecraft streamer is simple.
1) these shows run on networks so anything too outthere is going to be restricted in some degree.
2) These shows go through in an incubator and have to be crafted in such a way that allows for jokes to touch on dark subjects with out actually just condoning the thing they are condemning. ( Though to be fair south park even with that time, has been guilty of this )
3) Parents can actively and more easily curate the content being shown to their kids on TV.
TV is a long standing institution in the world, Cable too and it has things that allow for parents to curate what they feel is inappropriate. This is much easier to do in cable services because they advertise regularly they have monetized and made convenient the idea of sitting your child in front of the television and leaving and not having to worry about whats happening.
Which is another bad thing, but we will get to that in a second.
Youtube? Not so easy, paren't see their kids watching a video game, you know they just assume they are watching a video game. Especially stuff like mine craft which is just video game lego's . Seems tame enough, not understanding the usual streamer/youtuber game format that also continues continues to permeate this medium.
What would fix this is parents actually paying attention to at least, some of the content their child consumes. And talking to them about it. But that hasn't happened in any meaningful capacity since..... ever. Until there is some fox newscast about it and then they care for a bit and stop. So youtube would need to curate that, and youtube curating anything besides the lining of their pockets is one of the most laughable things ever.
Folks need to talk to their kids about who, and what the fuck they are watching, listening ,reading ect.