He directed the stabbing comment at Trump - no doubt about it. He’s lying now; covering up in claiming he was talking about stabbing his producer. What a total wacko.
No doubt about it huh! Did you even really bother to check it out?
They were talking about when the candidates all said they would support whoever the nominee was even if it was Trump. Then Glenn says, "I don't know what I would have done if I were sitting in their shoes." "Eh a, I can't say it that way." "If I were on the stage I would have said, have you been listening to him, tonight?" "Have you been listening to what I say about him?" Then Stu interrupts, and says "Also why would you be sitting in someones shoes?" Then Pat says, "Sitting would be weird." Then Stu says "I mean were they gigantic shoes?" (Glenn is Big) Then Glenn says, "Only if I were close enough, and I had a knife, the stabbing just wouldn't stop."
It is clear that was directed at Stu. They joke like this all the time.
Scroll down in this link to see the video, not the audio. It is clear he is joking with Pat & Stu. Glenn Becks Conversation on stabbing Stu