I read through several and skimmed over the rest and it's pretty much the same theme: mental health, education, gun control controversy, comparing back then to here and now, etc., etc.
The problem is not only all these same themes, but the two biggest problems we (the U.S.) has regarding this problem:
1. Mainstream Media! Constantly treating these dirt bags as infamous heroes. MSM gives these dirt bags way more attention than the 15 seconds they give to those doing something good helping their community. Not just these mass murderers, but every type of criminal seems to be MSM's hero.
When these POS scumbags no longer receive their fame it would go a long ways to stemming this type of crap.
2. Our (again the US) justice system is a very horrible joke when it comes to delivering equal and appropriate punishment for violent crimes, and repeat offenders of "petty crimes" [only petty crimes because law enforcement, lawyers, judges and politicians are not the victim(s). When they become a criminal's victim only then does the "petty crime" become more important requiring a much more harsher penalty.]
Bring back chain gangs, make prisons prisons a place nobody wants to call home; instead of these resorts jails, prisons, and "club feds". Reinstate the death penalty and start executing repeat/non reformed criminals, murderers, embezzlers, scammers, corrupt politicians, all drug related criminals from drug users to the growers/manufacturers of "killer" drugs to include "big pharma" executives (especially those knowingly and willfully selling/trading/dispensing and shipping out dated/expired drugs to foreign countries) crime would drop immensely and immediately.
There is a third solution to reducing crime and violence...start making parents (of minors) fully accountable/responsible for their child's/children's criminal behavior. Sentence the adult parent(s)/legal guardian(s) as if the parent(s)/legal guardian(s) committed the crime. IMO this would definitely have a major impact on crime because law bidding parent(s)/legal guardian (s) will take a more proactive interest in their child/children to avoid going to jail/prison or facing execution themselves for their offspring ('s)(s") criminal behavior.
I'll end my rant here. It just burns me up how parents pacify their child or children with "toys" (i.e. toys, TVs, computer games, etc) rather than spend quality time with their child or children until the underage daughter becomes pregnant or the child wants to become a full participant member of the alphabet organization and even then some parents still don't care about child.
