If you can’t pass a safety test, you shouldn’t have a gun.
That I would oppose. Once you start creating standards for the exercise of rights, it becomes very, very easy to set the standards high enough that it's functionally impossible to pass. We've already seen that kind of nonsense with literacy tests for voting in the south after reconstruction. I support making people sit through training, but I would oppose requiring passing a test.
I don’t want other people around me to be lethally armed.
I understand where you're coming from, because I know a lot of dumb people that are armed, and I've met more than a few people that I wouldn't personally trust with a gun. I had a college roommate that shot himself in his hand because he was fucking around with his handgun without, y'know unloading it. On the other hand, I've also lived in a city, and I lived in really shitty parts of that city (specifically, I lived in Chicago; I lived in Little Village half a block south of Douglas Park, Humboldt Park before gentrification started, and Austin). I've had experiences with the CPD that made me very, very aware that they were not going to be there to help me if anything happened. I had someone spend ten minutes trying to kick my front door in, and cops just... Didn't show up. My now ex-wife called and said there there was a "domestic" ongoing (e.g., she was saying I was trying to kill her), and cops didn't even show up for over 45 minutes. Where I currently live, cops are at least ten minutes away, and that's if they are willing to drive 80mph on mountain roads. Fundamentally, cops can't protect you, and if you aren't white and don't "respect their authority", they probably won't try.
...But I think that most of those things can be addressed culturally and economically rather than through additional legislation restricting rights. Violence is, more often than not, an issue related to--but not directly caused by--poverty and opportunity.
Yes. One is part of our constitution, and is recognized as fundamental to having freedom at all. The other is convenient and necessary for modern life in the US, but the need could be eliminated through appropriate public policy.
I argue that the moral and ethical right comes from the right to defend your own life (and the lives of others) and freedom, with violence if necessary. If you accept that you have that right, then accepting that people have the right to use the most effective tool for that is a reasonable conclusion. Some countries do not recognize that the individual has the right to defend themselves; those countries tend to also prevent citizens from owning pepper spray and tasers, since those can both be lethal.