But going into a political event all rowdy and pushy, getting close to the politician, knocking folks over, and best of all, carrying a firearm..... I'd say that's probably not the best way to stay out of trouble.
Folks might misinterpret the intent. Which is what appears to have happened.
I believe that's pretty much true. The problem with this fellow was not that he was armed -- that's totally legal. The problem was he was grossly impolite; you might say rude. Had there been others similarly armed who got their feathers ruffled by his rudeness, it could have gotten worse in a hurry. That's what I mean by getting in trouble.
Fortunately it appears he was released, so everybody can just calm down. Except of course the politician who will use this to her advantage.