I'm sure he's not the only one saying stupid shit...doubt there's a lot of them saying 'this' kind of stupid shit on twitter, as well as having their main photograph be in their uniform, but what do I know.
Let me ask you this: If I'm downtown and at a bar (not even in uniform) and I'm with my buddies saying a bunch of stuff that is promoting assault, sexual assault, using racist remarks, etc, and a coworker (maybe a female?) somehow overhears me acting this way (without me even know that the coworker is there)...should anything happen? If she mentions something to the boss, does the boss just shrug their shoulders and tell the coworker "Oh well...it wasn't on base". Or does the boss/supervisor take this guy aside and at the minimum tell them to stop acting like an ass-clown when in public and for saying such stupid things?
I'm not at all suggesting they toss this dude out, what I'm saying is to give him an ass chewing to let him know that when he does this on social media (with his picture and/or name available) that he not only makes himself look bad, but that he makes the Air Force look bad. This then gives him the feedback that he needs, since he obviously sees nothing wrong with what he is doing, and allows him to correct his behavior without a negative mark on his record. Tell him to take down his pictures and use a ghost name if he feels he just has to act like a thug.
Damn, we get in trouble if we say 69 or have a picture of our wife in a bikini at work, but this shit is allowed? Maybe I'm just getting old. Get off my lawn!