Glenn Beck is obviously a self loathing misanthrope whose entire history is littered with the evidence that he is on a quest to validate his unusualness. He believes nothing of the principles he bandies around - if he did he'd be a hell of a lot more informed about them than he is.
He strongly believes that if he could provoke a radical reaction - an assassination attempt, or worse - he would be validated. he believes that he will have proven the worth of his existence which he so thoroughly doubts.
All the signs are there, but - like the ginger stepping people who refrained from pointing out that Hasan was cruising for a bruising - we rear back and allow for an insatiably widening berth for this man's empty heart.
He doesn't believe in anything. He doesn't believe in himself so how could he believe in anything?
To engage him on any level that acknowledges the premise that it he has a "point-of-view" albeit a radical point of view, no matter how sound your argument is to open the gates to his Trojan horse gambit.
He only wants to see something go boom.
Marginalize him, not his opinions. Call him the Alyssa Bustamante that he is.