But what I fail to understand, and what no one here in this thread has even come close to making sense of, is how these people go from being upset about lefty clickbait to murdering innocent people by the dozens. I don't really think even you understand what you're arguing here.

They probably get tired of folks like you calling them 'right-wing incel nutjobs' and 'cowardly alt-right retards'. Some people get depressed and commit suicide when other people say mean things on the Internet. Others get pissed and commit homicide. What we witnessed in this case was the latter. And although I'm pretty sure that was far from the only impetus, your kind of juvenile rhetoric is not fucking helping.

Unless you want to make a case that these people came out of the womb as psychopaths, society is turning them into mass murderers, and then pointing the finger and blaming them for its own failures. Some of us are interested in getting to the root cause(s) of this problem, as opposed to just calling them names.