All decent people feel sorrow and righteous fury about the latest slaughter of innocents, in California. Law enforcement and intelligence agencies are searching for motivations, including the vital question of how the murderers might have been connected to international terrorism. That is right and proper.

But motives do not matter to the dead in California, nor did they in Colorado, Oregon, South Carolina, Virginia, Connecticut and far too many other places. The attention and anger of Americans should also be directed at the elected leaders whose job is to keep us safe but who place a higher premium on the money and political power of an industry dedicated to profiting from the unfettered spread of ever more powerful firearms...