Also Trump supporters don't equal Pro 2A. Most of my USA based colleagues are Pro 2A, including the Biden supporters, and most are not Trump fans.
Also most people that I know with gun permits in my country (extremely rare) are more knowledgeable on laws than most policemen; same for gun training, we do train policemen in the range and we see that.
In a neighborhood where people are armed there is no need to patrol on the streets. Guess what is the place around the gun range that is never robbed? The gun range. People don't take risks, they pick the easy targets, gun-free zones are perfect targets for people that ignore the laws.