BILL O'REILLY was a guest on "The View" yesterday, and when he said that "Muslims killed us on 9/11," WHOOPI GOLDBERG and JOY BEHAR walked off the set.  Whoopi lost it first, then Joy stood up, and Whoopi followed her offstage.

--But they came back 90 seconds later, after BARBARA WALTERS told the audience, quote, "You have just seen what should not happen.  We should be able to have discussions without washing our hands and screaming and walking offstage."

(--Search for "The View Bill O'Reilly on the mosque."  O'Reilly says it at 2:22, they walk offstage at 2:42, and they come back at 4:15.)