I think it could be seen as "separate the art. From the artist". Okay, yes, the artist is absolutely fucking horrific. But. If the music is alright, then it should be removed, especially if it helps others.

One example of this from me is Call Of Duty Advanced Warfare. Whilst there is an argument to be made about Spacey, I thoroughly enjoyed the campaign of that game and will replay it every so often. This has happened woth music artists that I thoroughly enjoy. Whilst I can't name any off the top of my head, I think one or two may have been on the worse side.

There's also a case for Elvis Presley, I have heard of bad things that he has done, and those are terrible actions, I do still enjoy his music.

For a really extreme example, Hitler. His actions and opinions are vile. But he was a talented painter.

My point being, I feel there is a case in Kendrick's opinions of R Kelly that whilst he doesn't support those actions, his views could be, fuck the artist, but don't fuck the art.