Tom Cruise and South Park

Tom Cruise is fighting against the South Park, because - to his mind - South Park has given offence to his church. I think South Park gives offence not only to the Church of Scientology, but to all.
And:
I like South Park, but don't like Tom Cruise. The South Park is humorous, but Tom Cruise is not. He is an actor and not an owner of the studio, but he could let ban the provocative part of the series. Why? Who is Tom Cruise?