I wonder about the ethics of that.
'If' it's considered necessary by so many people in the US to sport a
weapon to protect themselves against their own, How could you justify
an alien NOT being allowed to afford himself the same protection from
people who would often recognise him as a foreigner, possibly a
tourist and fair game?

You keep going on about the ability to protect your self but no one is
making arguments saying that guns are necessary to protect yourself or
even that we owns guns because we are afraid of something. Everyone
has been talking about the goverment taking away our freedoms and if
doing so is worth whatever benefit we may or may not have. I think
you are not even in the same argument here because you think that we
own guns soley for the need to protect ourselves but the fact is that
we should not have to justify ourselves at all. Here we have a thing
called innocent until proven guilty. Background checks and
regulations are fine as they are because they are designed to find out
if you have proven guilty already or not. If I haven't done anything
wrong then why should I be punished?