The debate over guns is like religion... it can divide the best of friends.
I suspect the general public and both sides believe the recent SC decision will change (increase) gun ownership throughout the US.
But people differ on whether that's a good thing or not.
I think it's a simple extrapolation that the higher the prevalence of guns, the higher the number incidents of gun violence will occur.
A link to Harvard's research center on prevalence and incidents is
here