Checkmite
Skepticifimisticalationist
Where did I say that?
You specifically said, research into why people feel that committing these acts is "the only, or most sensible, course of action". That implies you think there's reasoning there to dissect and understand.
What I suggested was hard work and advocacy for both better tools to treat and identify these things before they happen and to change social forces so that people won't want to do these things.
What do these things even mean? They're indistinct and nebulous.
Now it simply isn't possible to prevent these things completely, and it would be rather hard to measure 'success' at preventing something so statistically rare and sporadic. However, it's difficult, not impossible. The things I suggest also have other benefits too of course besides reducing spree killings.
But this isn't something WE can do.
You and I can press to get a law passed, or policy made. That's something WE can do.
"Research" is something we have to hope other people do, because you and I aren't the kinds of scientists who can meaningfully contribute to that line of inquiry. That's what I mean about doing nothing and hoping that other people do something. Wishing that other people will "do research", based on the blind hope that if enough "research" is done a solution must and will present itself at some point because...it just has to.
I guess in the meantime these things will have to keep happening so that we can "research" what methods don't seem to be working. I suppose if I try hard enough I can convince myself that by quietly allowing researchers to address the problem that's the same thing as "doing something".