Glenn Beck to Muslim-American guest:

From Thinkprogress:

“How do we know the difference between you and those that are trying to kill us?” In Nov. 2006, Beck made a similar comment to Rep. Keith Ellison (D-MN). “I have been nervous about this interview with you,” Beck said, “because what I feel like saying is, ‘Sir, prove to me that you are not working with our enemies.’”