See it is hard to solve something when you are looking in the wrong places. Mental health is a red herring being pushed by the parties with a vested interest. I can post links to dozens of studies by top psychologists in the world (but I wont because I have been given a vacation for posting too many links - spamming they called it). And they all come to the same conclusion - summarized by this:
Are All Mass Shooters Mentally Ill?
Here is the link, but I know most wont bother to read it, since it might disturb peoples world view. If you are interested in truth and not propaganda as so many claim - the take a look.
"They discovered that only 11% of all mass murderers (including shooters) and only 8% of mass shooters had a serious mental illness. They also found that mass shooters in the United States were more likely to have legal histories, use recreational drugs, abuse alcohol, and have histories of non-psychotic psychiatric or neurologic symptoms."
Let me repeat that, 8% of mass shooters have mental health problems associated with the shooting.
According to John Hopkins Medicine , 26% of Americans 18 and older have some form of diagnosable mental health.
Repeat that - 8% of shooters are mentally ill, 26% of the general population are mentally ill. Hmm.
So, there is an interesting anomaly here - MORE people that are NOT mass murders have some form of mental illness than the mass shooter. The shooters would seem to be "healthier". (that would be a false comparison, for those paying attention - since there are very few shooters so the sample size is very small.)
Mental Health Disorder Statistics | Johns Hopkins Medicine
According to other sources, 20% of the worlds population has mental health issues.
So, PLEASE, since you claim mental health explains mass shootings and school murders, PLEASE explain why the US is the ONLY country experiencing regular school shooting. Great Britain hasn't had one since 1996 with they banned most guns. Coincidence?
PLEASE explain WHY there are not MORE shootings since the general population has 3 times as much mental illness as the shooter population?
There, Did I repeat it enough times?
I won't wait for an answer, since EVERY single person I have asked, failed to respond with an answer. Typically if they answer at all they just deflect with "things are different here - yeah they are different. We have 400 million guns on circulation. And in this particular case virtually no requirements to buy a gun except a government ID, be 18, and breathing. (Oh and a pocket full of money)