Gee, we are still discussing the worst case scenario - a gunfight - where the after action analysis shows the real tactical failure was behavioral.
Again: Guns, alcohol, politics. Fail. Obviously the participants CAN'T handle all three and the smart ones weren't followed or stalked. Those were the people in the tables around them. All taking in a Lesson Learned about Shooting Your Mouth Off.
The basis of the incident is a failure to self discipline a conversation - which is where a lot of gunplay incidents start. If the general consensus is to jump ahead and discuss the tactics of discharging firearms, there's another failure in discipline - to see the real cause and stick to that error.
When everybody is a hammer, all they see is nails. I'm taking it from the posters here the consensus is we need to carry double stack .45's in dual shoulder holsters and resolve the situation dual wielding them in a street duel?
How bout you lower the volume and keep your conversation to yourself? Being loud, insulting, and obtrusive at a bar isn't the kind of behavior those who carry concealed should employ. Ask any professional. Regardless of the results of a shoot out and trial, you can bet your knickers getting loud and abrasive while carrying a firearm will be highlighted as a major issue. The cause of the problem started at the table, not when others got dissed and started stalking people. It's the same forensics the fire marshal uses, you find the initial point where the fire was set and that's where the responsibility lies.
This was self inflicted. Don't drink, get loud, and carry guns only to wonder if you need a bigger one. Nope, what's needed here is a smaller ego and the social responsibility to keep your opinions to yourself in a bar. Of all places.