if your assuming that you and any other person around you is gonna snap and go violently insane at any moment, you might want to get your head checked.
Statistically, people go crazy all the time. And that might just affect you in a bad way. The chance of it happening is much bigger cause everyone have a gun or can get one in 5 minutes.
Just so you understand, from a European perspective, the pro gun arguments from the US seems pretty much idiotic and near absurd. Sure you can have guns here too, if you really want, but people feel no need to have one for protection. Because criminals almost exclusively use guns against each other, and on extremely rare occasions like bright day bank robberies, against cops.
In the US people have guns because people have guns . In the EU, we don't have have guns for self defence, because no one uses guns against each other. (and the criminals only target each other.)
Now. Wouldn't it be nice to not have to have a gun for self defence? Wouldn't it be nice to not having to worry about everyone having a gun?
The problem is not YOU. I'm sure you know exactly how and when to use or not to use a gun, how to store it etc.. The problem is statistics. A certain % of any society are unstable retards, and the best way to stop them having access to guns is to remove most of them from society.
OR: Rigorious checks on people allowed to have guns, I'm talking lockers, tests, no carry permits etc.