I'm just clowning you. I know he was shut down or "pressured off" for sure. His show took place at the height of positive race relations in the US (1995-2005) and that really puts a damper on the communist agenda and their dialectical materialism.
As to it being Oprah's doing specifically, not so sure of that. I mean,
he appeared on Oprah to tell at least
some of his story after his sabbatical, so I find it a little hard to believe he ran straight back to the one that drove him away. Maybe tho...