But back to entertainment and culture: could you enjoy the product of a vile person, but this person for some reason doesnt benefit from it or they already died?
I had to give this a lot of serious thought. I think I can finally answer you.
Yes, with some caveats.
Some works are themselves so disgusting and terrible that they cannot be saved. There is no way you can enjoy Mein Kampf without being an innately awful person. This actually affects some non-fiction as well: Julius Evola is the only primary English language source for a lot of European esoterica of the medieval era, and he’s filled it with fascist notions from top to bottom. The work he’s done is so tainted that it cannot be trusted. This is also true of much fiction and entertainment. You can’t listen to Skrewdriver and be anything but awful. It’s non-negotiable.
And other works are so bound to their creator’s awful nature that to enjoy them necessitates consciously rejecting their creator’s intent — knowing what they were communicating and saying “No.” I find this to be true of Lovecraft, though that’s asking for a flame war if I don’t add that that is my personal view of the matter. (Incidentally, I think Lovecraft was a shitty writer to begin with, independent of his qualifications as a human being.)
But usually, yes, I think you can enjoy a shitty person’s work independent of their beliefs, so long as you aren’t supporting them or their beliefs. Under current copyright regimes, this usually means piracy if they don’t enter the public domain and the royalties don’t land with individuals and/or organizations opposed to their beliefs.
I dont know if it was my mistake to frame the issue about "the joy" that a creation offers the consumer as being the sole factor, even tho it does seem to be a big factor. So the way to circumvent a joyful creation from a vile creator is to in one way or another the creator receiving no benefit from it. So i think the dead get a free pass on a lot of things?
But it was mentioned before about not things that bring joy but that are practical and useful... the discoveries made thru atrocities and by war criminals... also for example, Mein Kampf i think (?) its still banned in Germany because its a taboo subject and they cant trust their citizenry to read it responsibly (?) while in reality it can be a great resource to understand this person's rationale for what he did... Mussolini's "The Doctrine of Fascism" is important in that sense too because we get to understand in a philosophical level what he wanted to do. Then theres a billion documentaries about serial killers which can be used by either wannabe killers or those seeking to understand them clinically. Faust mentioned Burroughs.
So in synthesis one could say that:
1) Regarding culture that brings joy but the creator is a shithead:
-One can consume it without problem if the creator isnt too untolerable
-The creator doesnt benefit from the creation
-The creation isnt itself tainted enough by the creators bad tendencies
2) Regarding culture that brings understanding/knowledge:
-As long as its useful (?)
Theres a lot of nuances that can be added like "can/should" and how a lot of it is after all a matter of taste... but besides all of that and coming back to the OP... theres this whole primitive mob mentality and virtue signaling (by both sides of the political spectrum) that goes on in the alluded Cancel Culture, and it just really reinforces the idea to an outsider of how divided in tribes and how fiercely everyone is after each others throats in America - i dont recall a single case of a creator or writer getting boycotted and drenched in tar and feathers here in Mexico, or for that matter in any other country, maybe im wrong and i dont watch the news enough.