Soul Train Awards

Watching the Soul Train Music Awards, I wondered why Don Cornelius is not in the Rock and Roll Hall of Fame.  Can anyone tell me why?  There's no excuse for him not to be there, if you know the history of Soul Train and how important it was in bringing R&B into the mainstream through the power of TV.
But then again Quincy Jones has been blacklisted, so maybe they have something against Cornelius too.