The Left always ceases an opportunity to capitalise upon tragedies, such as shooting sprees, to push one of their agendas. Banning firearms has always been the thing globalist/communist regimes seek to do. Australia falls into that category, for an examination of our laws and social system, sees us as way down the track of state control over he individual in all aspects of life. Self-defence is the acid test example, where for Australia, lacking any right to weapons, women and weaker people have no effective self-defence, and are at the mercy of home invaders. The individual has been stripped of the rights which the average person in Viking society of 1,000 years ago just assumed constituted a free man. I do not consider the police, who usually arrive after the crime to fill out the reports, any sort of first line protection, and in any case, there is no legal duty of the police to protect individuals at all. That is my interpretation of the Victoria Police Act 2013, for example, and of case law in the US where the issue has been discussed: 

“8 Role of Victoria Police The role of Victoria Police is to serve the Victorian community and uphold the law so as to promote a safe, secure and orderly society. 9 General functions of Victoria Police (1) The functions of Victoria Police include the following— (a) preserving the peace; (b) protecting life and property; Authorised by the Chief Parliamentary Counsel Part 2—Victoria Police Victoria Police Act 2013 No. 81 of 2013 12 (c) preventing the commission of offences; (d) detecting and apprehending offenders; (e) helping those in need of assistance. (2) Nothing in subsection (1)— (a) confers on any person any civil right of action; or (b) provides any person with a defence to any civil action; or (c) otherwise affects any civil right of action.”

     Thus, if the police cannot get to you in time to save you and your family from the attacks of some lunatic, and suppose you survived, you cannot sue the police for negligence, or anything else. Thus, in this sense, we are defenceless in Australia and have no real right of self-defence. That makes people just passive meat on sticks, not citizens, so Australia is inherently flawed as society. That leads us to the US shooting arguments, and the question of causes. Conveniently, the Left is ignoring the role of Big Pharma drugs in all shooting sprees:
  https://www.naturalnews.com/2019-08-18-dayton-shooter-found-to-have-mind-altering-ssri-drugs-in-his-system.html

“Just like we’ve long speculated, the latest news reports about “Dayton shooter” Connor Betts reveal that the now-deceased 24-year-old did, in fact, have SSRI (selective serotonin reuptake inhibitor) antidepressant pharmaceuticals in his system at the time when he’s said to have gone on a mass shooting spree, killing his sister, her boyfriend, and seven other people before allegedly killing himself. According to an autopsy report, Betts had not only been taking mind-altering SSRIs in the lead-up to his murder melee, but he was also taking cocaine, Xanax, and alcohol, three other deadly drugs linked to extreme violence. In other words, Betts was severely mind-altered by a combination of Big Pharma and Big Alcohol when he decided to take the lives of innocent people for no apparent reason. Mainstream news outlets are finally admitting the truth that, rather than being the gun’s fault, it was actually the legal and illegal narcotics that Betts had been taking that ultimately drove him to murder his fellow human beings in cold blood – these brain-damaging chemicals apparently manipulating the young man into doing something horrific that he otherwise may not have done. … Interestingly enough, the Los Angeles Times recently put out a report covering many of the mass shootings that have taken place over the past several decades. What it reveals is that, just as Mike Adams, the Health Ranger, has long been saying, pharmaceutical use is often directly linked to these shootings, as mind-altering medications can convinced traumatized youth especially to harm themselves and others. …

The vast majority of the mass shooters that the Times looked at had been traumatized at an early age, including having been exposed to violence. Many of them then went on to develop mental problems, including depression, anxiety, thought disorders, and suicide attempts, which in many cases also led to them experimenting with mind-altering drugs. A list provided by the Times of the shooters it looked at clearly reveals that almost every single one was taking Prozac, Paxil, Zoloft, Luvox, Effexor, Xanax, Ambien, Lexapro, trazodone, and/or some other similar mood- and mind-altering drug right around the time when they flipped a switch and went on shooting sprees. “The overwhelming evidence points to the signal largest common factor in all of these incidents is the fact that all of the perpetrators were either actively taking powerful psychotropic drugs or had been at some point in the immediate past before they committed their crimes,” wrote Dan Roberts in an article for Ammoland.com, which was reposted to Natural News. “Multiple credible scientific studies going back more than a decade, as well as internal documents from certain pharmaceutical companies that suppressed the information show that SSRI drugs ( Selective Serotonin Re-Uptake Inhibitors ) have well known, but unreported side effects, including but not limited to suicide and other violent behavior.” Adams has similarly drawn attention in numerous articles to the dangers associated with SSRIs, which continue to cause users to lose their minds and do crazy, and often violent, things as a result.”

     Trump has commented that the issue of mental illness needs to be looked at, and in doing this, the role of Big Pharma drugs needs to be examined as well.