What we've seen here (and elsewhere on other threads regarding this incident) is that many people are arguing along the lines of "Well, it wasn't "illegal", and he didn't actually engage in any threatening acts or verbalizations, but COMMONSENSE should dictate, and make obvious that he shouldn't have done it... because it's stupid...", etc.
I find this so ironic that people who claim to support Second Amendment-protected rights would turn to such a vague and ambiguous term as "commonsense" to argue their point, when that term is what is used by nearly all the opponents of Second Amendment-protected rights in calling for "commonsense gun safety regulations". That is, it's an appeal to something that is supposed to be so obvious and clear to anyone capable of normal perception and cognition, that it can't be disputed. Right? So anyone who disagrees with the "commonsense" notion that civilians ought not have any firearms ever in any public place (or have a suppressor or a semi-automatic long gun or be allowed to transfer a firearm without government approval, etc.,etc., etc.)... well, those people are crazy gun nuts, or some kind of demented deplorables. Yet here we have the very targets of those "commonsense" arguments arguing using the same, I'll call it false, argument. It should be "obvious", that if people vehemently and diametrically disagree about what is or isn't "commonsense", that there really is no such thing and any argument using anything resembling an appeal to any such or similar concept is false. Say what you actually mean, otherwise you might as well argue it's because "the gods have decreed it".
And, here, from another thread on another topic, is a post from something using the screen name "commonsense", which pretty much sums it up:
commonsense August 11, 2019 9:26 am
Absolutely! The second amendment is not sensible in this day and age. I believe most people would agree not to completely outlaw every gun, just have much stricter laws and enforcement. Ban all assault and semi-automatic guns.