Re: A gun is involved in every single mass shooting.
"The US has a problem with violence and mental illness"
Just stop right there.... the vast majority of people that have mental health issues do NOT and are not violent.
I don't have a gun, I don't know anyone with a gun, none of my neighbours have guns.... none of their friends have guns... how many gun deaths do you think there were in my neighbourhood?
It really doesn't matter how you try and justify it the US has a problem with violence and a ready availability of guns. full stop.