Not to beat a deadhorse, but to keep the focus of disgust/frustration, if any, directed toward the cause of the danger to the public... the cop did not draw his gun, just put his hand on it. Again, just for the sake of arguement, it is an open carry training when dealing with unknown people approaching you, or at the beginning of a possible crowd control or whatever, to turn your hip (holster side) away from the approaching person(s) and additionally place your hand over your firearm to protect from anyones access to it, and if the situation escalates, for your ability to already have one hand where it needs to be . The part about the guy being "elderly" we seem to assume he is "weak and feable", but I know plenty "elderly" guys who are tough and mean, SOBs with more attitude than when they was in their 20's, no joking and they pretty much talk and say whatever they like to whoever they like. Again, not saying this was the case, but just providing another possiblity. Just think of the other extreme, the LEO starts to nicely have conversations (talk story) with everyone who walks up to him about what is going on, which he himself at the time probably has only limited information, and someone walking around waiting for their turn to talk to the officer, gets hit by a stray bullet, fired by the guy in the house down the street, which from a rifle can easily travel over a mile away, again lucky this was not the case. As the saying goes, "hindsight is 2020" now that we have the outcome it is easy to judge the "should have could have". At the time the LEO's method, no matter how crude, rude and unacceptable in the world of polite, kept everyone in their car, and now that all is safe and we know more than before they can report what he said and the situation addressed now that the danger is gone. I'm pretty sure if you ask anyone who has been "under fire" all kinds of descriptive words are used and mixed in as a part of the intended communications no matter how much you train....