South Park is a really funny show, I watch it all the time.
I agree! I've seen it a few times! The story line revolves around 4 main characters living in Colorado, correct?
Yes that is correct, they live in a place in Colorado called South Park.
One episode I saw, the town removes all aspects of Christmas to look politically correct, which I thought was hilarious!
I think I know which one you are talking about, although there have been many Christmas episodes, they are all pretty hilarious!
I loved the Christmas attack one, too because so many guest stars appeared in it! 
That might be my favorite Christmas episode of South Park.
Do you think most episodes are written by the co-founders?
I think they probably have a large team of writers at this point.
David Thorne, one of the writers, writes for Ellen, too!