You’re right. I watched it only because it was talked about here on FR, but the way he kept making references back to it during the rest of the show tells me that this was a controlled event that he orchestrated just for the show business aspect of it. In other words, it was just for show. Manufactured outrage.
I think he honestly lost his cool, and felt the need to justify his outrage for the rest of the show, because he didn't mean to show the viewers that loss of emotional control.
I think he's just had enough. oboma is getting away with the most destructive policies this country has ever had to endure, and even O'Reilly can't stand to watch it anymore.
He's usually a middle of the road type of guy. If he takes sides, he loses viewers. His claim to fame is his lack of bias and sticking to just the facts.