Gun control won't work as killers are mentally insecure and we are filled with weapons of mass destruction. Making automatic weapons illegal and against the law could help, then shootings would be just normal America. One shot here, one there no biggie right? Welcome to America and good luck staying alive. Japan or England anyone?
Resentment is both individual and an emotional trait psychopaths and others play to win or convince. I am working on a thread on hate and another resentful white man murders others because they are others and he sees them as less than him and an incursion into what should be his alone. Evil is so obvious in America today, it hide under the covers for a while, but a 'black' president's election, and a now psychopathic president has pulled the covers back.
To be fair this happened before Trump, he is only part of the hidden made visible.
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The shooter is almost always male. Of the past 129 mass shootings in the United States, all but three have been men. The shooter is socially alienated, and he can’t get laid. Every time you scratch the surface of the latest mass killing, in a movie theatre, a school, the streets of Paris or an abortion clinic, you find the weaponised loser. From Jihadi John of ISIS to Dylan Klebold and Eric Harris at Columbine, these men are invariably stuck in the emotional life of an adolescent. They always struggle with self-esteem – especially regarding women – and sometimes they give up entirely on the possibility of amorous fulfilment. There are different levels of tactical coordination, different ostensible grievances and different access to firearms, but the psyche beneath is invariably the same."
https://aeon.co/essays/humiliation-and-rage-how-toxic-masculinity-fuels-mass-shootings
"From New Zealand to Pittsburgh to a synagogue in Poway, Calif., aggrieved white men over the last several months have turned to mass murder in service of hatred against immigrants, Jews and others they perceive as threats to the white race."
https://www.nytimes.com/2019/08/03/us/patrick-crusius-el-paso-shooter-manifesto.html
'Why some white supremacists eventually give up on hate.'
https://slate.com/news-and-politics...why-and-how-racist-extremists-can-change.html
"The main hypothesis concerning group-think is this: The more amiability and esprit de corps among the members of the in-group of policy makers the greater the danger that independent thinking will be replaced by group-think, which is likely to result in irrational and dehumanizing actions directed at out-groups." from 'Sanctions for Evil;' Sanford and Comstock, 1971