I see an article that says in 2010 he didn't change the lyrics to a song that included the n-word when he performed it. I also see the 2014 instance where he wore a confederate flag jacket. That's very disappointing.
Do you have more information about the blackface incident? I can't find any in my searches, but I know multi-lingual searches are challenging.
That is really, really disappointing. Thank you for speaking up.