A) The Left's thug mentality that we take as a serious threat.
B) The "largest collection of reasonable men ever gathered in one place at one time in history"
Among others, Bill Whittle quotes Thomas Jefferson,
"What country before ever existed a century and half without a rebellion? And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
If you haven't picked sides yet, you better be making up your mind. And fast.