I don’t think they know the motive for sure in the NY shooting, but this report seems to indicate the shooter had recently lost his job.
Two shootings isn’t enough to assess a trend, but I will say that the rise in unemployment does concern me for reasons like this. Even if the unemployed person only kills themselves or goes out to rob a convenience store without killing anyone, it is a tragedy.
Sadly, the job market will not get better as quickly as the stock market, which means that there is the potential for desperate people to do unthinkable things.