The title is misleading. The man did not go berserk, he engaged in a calculated tactic to combat the very real arguments of John O'Neill.
By shouting over the others and repeating the word liar again and again he diminished O'Neill's opportunity to make a coherent case and he created doubt in the minds of viewers who were not already familiar with the accusations against Kerry.
It's a clear example of an ad hominem fallacy. If you can't make a persuasive argument in response to someone's assertions, attack the person instead.
Disagree, whether calculated or not, he came off as a nut.
Mom and Pop America are not going to respond to this kind of venom. He might have scored points with Soros and the ACT UP people, but he lost most of the audience.
If it was calculated, it was still STUPID.
How many invitations do you think this maniac will get to appear and debate anything, if his only "point" is liar liar liar liar liar liar?
Not only that, but now I want to read the book more than ever.
O'Donnell is a nut, and he just helped the Vets and severely damaged his career. IMO
I agree.
It is also deflection. Now the argument is all about this behavior and no longer about Kerry. Mission accomplished.
The greater their doubt, the LOUDER they shout!