Hmmm... that's funny, 'cause his mom put the CD out. I have it and it's got like a 4-page layout of their plans on making the Tupac Youth Center for Arts. It's a soundtrack to a movie, so it's not set-up by the regular standards of an album either.
The guy went to a prodimantly white school growing up, just because you are a Black Panther doesn't mean you aren't going to work with White People.
He would NEVER work with Eminem, but he would work with John Belushi? Ok, I gotta say that some people make poor assumptions. I can't say whether or not Pac would work with Em, but if his mom felt it best to utilize Eminem on production and on song making, then so be it.
Give the CD a chance, it's not that bad. It's a soundtrack, so don't expect a Classic Album, but it's a great album. That "Rear View" track is the hottest, in my opinion.