You can't trust a man with a gun, but you can trust gov't with all the guns. Civilian man with a gun = bad. But many gov't men with guns = good.
But here's the deeper challenge: The central problem concerns what's in our hearts, not what's in our hands.
Lone shooters kill in tens. Unleashed gov't shooters kill in thousands and millions.
A humane critique is not naive about the horror that comes in tens nor the horrors that come in millions.