When 9/11 truthers confronted Tucker Carlson on the campaign trail ahead of the 2012 Iowa caucuses, the famous former host of CNN’s Crossfire didn’t mince words with the conspiracy theorists.

“It’s filthy to say things like that with no evidence, and you have none, so you should stop,” Carlson said. 

What about the family members of 9/11 victims who were asking questions? “Parasites like you make it much worse for them,” he replied.

The 9/11 truthers also confronted Carlson about his decision to abruptly leave a 2008 Ron Paul rally. Ahead of the 2008 Iowa caucuses, Carlson, who initially supported the Iraq war, wrote a profile of Ron Paul for The New Republic in which he concluded that he admired the anti-war Texas Republican congressman and presidential candidate so much that he wanted to wear a Ron Paul sticker.