How should I judge the rapper Eminem?

I love the rapper Eminem. In terms of lyrical writing ability, I consider him the most gifted individual probably in the history of music, and a better poet than anyone who writes poetry. Much of his content, which includes lyrics glorifying drug use and raping and killing women, is morally abhorrent on the surface; however, it's obvious to me that he doesn't intend for such statements to be taken literally, and I actually find some of his most "evil" lyrics to be quite fun. I am struggling to understand why I find such artistic value in such malevolent music. How should I judge him and similar musicians?