Well we have a video, one of many, from this President Barry Soetoro campaign donor ($550.00), Norman Leboon, who threatend to kill Republican Congressman Eric Cantor.
I have listend to many liberals, progressives, socialists, and assorted moonbats in my day but this guy sums up why you can not argue with them.
The FBI arrested this guy without the use of flame throwers, tanks, helicopters, or snipers - as far as we know. He isn't a Christian militia member, just a progressive activist making death threats.
Check out Norman Leboon on You Tube for a sample of progressive ideology on display.