It's whites versus whites in a status war.

Ann Althouse posts on the fact that 55% of the people in this country support the NRA's approach to school violence.  One commenter makes a point which is worth considering.

It's whites versus whites in a status war.

Boiled down, here's the thesis.

Coastal whites are afraid of urban minorities and want them disarmed, but they can't say this for the obvious reasons.

So, their bitch against guns is diverted into a rant against the crazy rednecks in flyover country who obviously want to go on a murderous rampage against minorities and gays.

In terms of motivation, it makes a great deal of sense that this would be the underlying reason for white urban liberal support.