Let's not blame all that; no, let's blame those of us who stand up for civil liberties, even the civil liberties of people too cretinous to appreciate them.
It's clearly our fault for using "inflammatory" language. Ya know, for calling a spade a spade, for not retreating into euphemism, for refusing to go along with government- and corporate-sanctioned procedures that do nothing to offer security but do a great deal to control the population and make a few people very rich. It's because we've been pointing all that out for years that Paul Ciancia walked into an airport and started shooting.
So I guess we can now blame the Federal Reserve. Perhaps if the Federal Reserve had been more "temperate" and "less confrontational" in its press releases over the years, Paul Ciancia wouldn't have gone off the deep end.
This country is reaping what it has sown. Yet it refuses to acknowledge that. That refusal, too, is part of our long, bloody, violent history.