You know, I'm not even a guy who gives much a **** about guns in my personal life but am largely pro-gun in general political. Had the NRA simply came out and largely defended the reason why gun control in response to this is idiotic, called for a focus on mental illness or parental involvement if they wanted to go on the offensive a bit, and basically express their sympathy for this situation I'd be having nothing negative to say what so ever and may've actually been applauding them. But when they attempted to get on some kind of moral soap box, proclaiming moral indignation over the notion the Media/politicans doesn't treat violent video games and movies in a similar fashion and suggesting that those things are actually more worthy of such coverage/action and scapegoating something else as part of the "Blame" for these kind of things, THAT'S what gets my goat and moves me out of a position where I can support them.
Not to mention the whole "armed guard" thing in and of itself is a rather idiotic notion, not to mention one essentially encouraging greater government spending and further federal mandates to the education system. And, of course, beyond that it's basically attempting to capitalize on this to respond by making a political argument that favors their specific political agenda....the type of thing NRA supporters were condemning the Democrats for doing regarding the tragedy.