It is necessary to distinguish between areas of importance(/value). I can financially support the art of any person, while hating him for something else. It's normal and right to divide, to differentiate things. Otherwise, nothing will happen just because there are no perfect people that none of the billions could complain about.

you can choose to not engage with art that you dislike for any reason. but not everyone is you.

and quite frankly, you're being extremely dramatic. no human is ever pure evil or pure good.

that's not how life works. this isn't a fantasy world.