You got it. Correlation is not causation, but it's hard to unlink the two issues. Many people are helped by meds, but even the prescribing labels on these drugs warn that in a small number of cases it results in suicidal ideation, rage, etc. So it's just a question of math - millions of people on the drugs, that means thousands of people are going to snap.
The media rarely makes mention of this, and the obvious reasons why I can think of are 1) it doesn't suit their agenda and 2) they don't want to stigmatize mental health issues. If they really wanted to make a case then they will say "anyone on mood altering drugs is banned from guns". Ironically, if you are an illegal drug user (even medical marijuana, or cocaine, meth, etc) you are supposed to declare it on the forms and that is automatic denial of a gun purchase. But it won't trigger an automatic confiscation of guns. Yet.
Any word yet if this murderer was on any of those mood altering/depression meds?
IIRC, he had previously been on a med routine but not at the time of the murders.
I was in the Army Reserve in 2009 when panic came to us down the chain of command that there had been more soldier suicides in 2008 than battle deaths. There were mandatory briefings, how to watch for suicidal tendencies, scenarios, PTSD, etc.
None of the CG’s recommendations included getting the chaplain corps involved. No role for spiritual support.
The panic later collapsed when it came out that NONE of the 2008 suicides were combat veterans. Then a trickle of info emerged that most of the suicidal people had been under treatment with antidepressants.
The cause & effect was impossible to miss, yet that’s what happened. No combat-related flashbacks, just reaction to overprescribing.