Oh look, the NRA rode into town.
To be honest I lack the inclination to argue this with any American gun advocate. By the very fact of being an American gun advocate you’re intentionally blind to the phenomenon of regular mass civilian shooting, a phenomenon that is almost uniquely American in the developed world. Intentional blindness is something an Internet discussion isn’t going to cure.
I will simply observe that local variations in gun law in the USA are, as far as I can see, irrelevant to the argument - if not a deliberate red herring - because there are no internal borders in the USA preventing guns being bought in one place and used in another. Thus any attempt to draw false comparisons between one city’s murder rate and its gun laws, and that of another, is a bit of a waste of time. But then, as I said, the whole debate is a bit of a waste of time. Far too many Americans seem to see the occasional mass slaughter of their fellow citizens as an acceptable price of freedom.
You have a collective sickness of the soul.