I'm surprised it took so long. I heard about this a while ago, but an emailer just reminded me. Some of you may not remember, but Mark was one of those C-list right wing talk show hosts that spewed hatred as often as he could. I highlighted his behaviour and then he sent out an email saying I was inciting threats against his dog. Pretty pathetic.
I first posted about him when he attacked Cindy Sheehan on Hardball. (video)

O'Donnell: "Mark, if you don't mind, you're making the case that Cindy Sheehan is hurting the morale of our troops?"

Williams: "She is aiding and abetting the enemies of this country and the people who killed her son. And right now Casey Sheehan is spinning in his grave!"

He later attacked NOLA victims by saying: (video)

Williams: ..they didn't have the necessary brains and common sense to get out of the way of a Cat 5 Hurricane and then when it hit them- stood on the side of the convention Center expiring while reporters were coming and going..

Morris:...that's just sickening---that is atrocious what you are saying...