Michael Reagan calls for Mark Dice's murder

The crazy thing is, I used to like Michael Reagan. Can somebody please explain to me what is treasonous about what Mark Dice is doing? Whether or not you agree with his point of view, you have to take into account his motivation. He believes that everything that the soldiers are fighting for - and dying for - is, well, a lie, and wants the troops to reconsider for whom and what they are fighting. Not too many people are going to agree with that standpoint, but how does that make Mark Dice a traitor deserving of death?

Somebody explain this to me.