Those "morons" are morons for engaging this specific form of protest in the first place, irrespective of whether they're controlling their weapons properly or not.
It serves no useful purpose for their cause, in terms of garnering any kind of meaningful public support, and if anything puts responsible gun owners in a weaker position when the average person comes to associate them with these bozos.
There is a line going around of these guys are "protecting their 2nd amendment rights by exercising them", but the practical reality is, that displays like this make it much more likely for additional restrictions to come down the pike to avoid similar "exercises" in government buildings in the future.
And whether they are adequately controlling their weapon, or not, doesn't answer the question on the dividing line between "open carry" (sometimes legal) and "brandishing" (usually illegal).