The two things I mentioned in that post (RDJ in Tropic Thunder and Always Sunny in Philadelphia) are a different context than Kimmel blackfacing as Karl Malone, at least in my opinion.
Kimmel is classic blackface. Mocking, stereotypical, etc. With RDJ and Always Sunny, the use of blackface is in line with the terribleness of their characters. It is made clear that what they are doing is wrong.