Respect to your knowledge, friend, but they'd have to be fools to charge that dude. Any half decent defense attorney would be drooling over this case. In the heat of the moment, you don't have the time to respond in kind. Those guys knew they were escalating a situation and what the potential ramifications of their actions would be.
They wouldn't make sympathetic complainants at all starting **** at a bar. There's always a real world component to every case, and when juries are involved, you need a compelling and sympathetic story. And a couple meatheads starting **** at a bar and then getting tuned up isn't sympathetic or compelling.