The most deaths by guns...

You simply can't compare the scourge of guns on our streets to the scourge of gun suicide. You see, if a person really wants to kill themselves, and can't find a gun, then they are just going to find another weapon to use, like a knife or a blunt instrument.

On the other hand, if a person is going to kill another person or people, and they can't get a gun, then, oh wait.........

That's totally false. Study behavioral psychology and you'll learn that the interface significantly influences the behavior. Take two scenarios

a) suicide can be completed by the push of a button
b) suicide requires painful cutting of flesh with a knife

You definitely will not see the same results in both cases.