[El Cid]

If I am not mistaken, 100% of the mass shooters in the United States have been either left-wing Democrats, or come from left-wing environments (family). I grant you that they were all insane, and on brain medication -- but it is also interesting that these gunners came from ostensibly gun-hating Democrat families. So maybe we can reach a compromise: left-wing democrats should not possess firearms.
I include the United States qualifier, because that Norwegian whack job was a right-winger -- albeit one who was a 'solid' atheist. As such, I guess what he did was logical... (from a crazy atheistic point of view).

[Wanderer99]

I grant you that they were all insane, and on brain medication -- but it is also interesting that these gunners came from ostensibly gun-hating Democrat families.

Not all gun-hating but definitely amoral/atheist and socially liberal.