As is the case with Muslim terrorism, a certain profile exists to these shootings. But just as liberals are aghast at the thought of using profiling to stop Muslim terrorism, so they blanch at recognizing the common denominators in almost all of these recent shootings: young white males who have mental health issues and are exposed to SSRIs or other "anti-depressant" drugs. And of course, the liberal solution to this problem is to try to take guns out of the hands of all law-abiding citizens, rather than address the problem at its source. Like all liberal causes, regulating guns combines a failure to address realities head on, with hidden agendas. And you wonder why their policies always end in failure.
You nailed it.