He's a closet dictator (like all commies). The degree and method of force he uses depends what the circumstances deem necessary. We're really not to the point of brownshirts, yet. (And if/when that comes, they'll look just like your neighbors...because they will be your neighbors.)
Peer pressure will take a dictator a long way.
If the Republicans call his bluff on this, you'll see the brownshirts in the streets. The flash mobs in Chicago who were attacking white folks or whoever wasn't one of their group were just a dry run for this and confrontations Barry has planned before the election. He figures that every confrontation he can cause helps him win back his base and get him that much closer to being able to steal the election and that many more people motivated to turn out the next time he wants a mob.