Politicization is not when you hear about a tragedy and, instead of simply mourning, look to answers for preventing future incidents.
Politicization is asserting that the shooter chose his target because he knew it was a gun-free zone.
And claiming that lack of prayer in school fostered the massacre.
And dismissing proposals to curb gun violence as liberal claptrap.
And insisting, uniquely to guns, that passing laws is pointless because criminals will break them.
Gun violence shouldn't even be a political issue. But it is. And those making it so are mainly the people who complain about politicization.