One does not need a gun to do a mass murder.
Mass Murder without Guns
The fianl graph tells the truth better than I. If we get distracted by the mode, we miss the cause. You can continue to blame the inanimate object if you choose, but you will not solve the real problem.
"In the U.S., the core problem underlying most mass murders is people with severe mental illness, who in 1960 would have hospitalized before chalk marks had to be drawn around bodies. If we solve the mental illness issue, the guns do not matter. And focusing on the guns directs the severely mentally ill to other weapons."