As for the NRA? Not peep/tweet from them since all hell broke loose.
It's a common myth that American massacres are total surprises, where no one imagined the perpetrator capable of such the crime.
In fact, as this 2002 Secret Service report (pdf) on school shootings concluded, "most attackers engaged in some behavior, prior to the incident, that caused others concern or indicated a need for help." Yet those concerned others often did not or could not act; the help wasn't proffered.
Can we imagine that this has nothing to do with our patient-centered culture, in which the troubled person's rights and needs come before anything else?