Yes, having massacres in schools is the price Americans are prepared to pay for their 'right' to own ridiculously powerful weapons and to take concealed weapons into places like schools. I put 'right' into quotes because the amendment could just as easily not been approved back in the day, and that would have left the NRA, and the gun and ammunition lobby and the victims of their reprehensible propaganda hanging out nowhere legally, logically or what they might call 'morally'. There is no cowboy on high ground in the gun argument.
I hate to sound like a reactionary here, but movies and other media which not only celebrate extreme violence but also teach, sometimes subliminally, sometimes blatantly, and that such actions are the best way to solve social and even private problems must also take some part of the blame as they pull us into a circle of craziness where reality copies the movies, and movies corroborate reality.
There was also a good article in NYT yesterday or the day before, with a line about Americans preferring to have assault rifles than generally available health care and proper access to good education. Fucking crazy country.
As for the frontier mentality about winning the West with guns as a reason for owning these weapons in the modern world, surely it was the controlof weapons that made the frontier safe and liveable. The iconic Gunfight At The OK Corral as the famous example was a dispute about the bad guys not handing in their weapons as required...