Today there is no way to keep guns out of the wrong hands. Anyone can make a gun using the Internet. There have even been cases of soldiers stealing guns from their bases and selling them to dealers.
It’s true that a law passed tomorrow will not suddenly eliminate all guns, but if better regulations were enacted and enforced, there would be fewer guns around and fewer guns deaths.
Tell me, living in Israel, would you employ your reasoning to allow guns to be sold to Arabs?