While I know they don't want a solution, I at least know the underlying psychology of why not.
- What stops a person with a gun?
- 99% of the time, it'll be another person with a gun.
It is this basic premise. Fear. Fear of other people with guns, fear of not having your own. Thus they cling to that fear and the "solution" of the 2A. Irregardless of how illogical it is to feel safer if everyone was armed VS very few people. America has aptly demonstrated time and again that being armed results in a death toll. Blinded by fear, Republicans simply refuse to see reason from madness. As is typical in being human.
They don't want the kids to die. It is just impossible for them to arrive at a proper conclusion to the problem at hand.