http://www.slate.com/articles/technology/bitwise/2015/10/the_umpqua_shooting_brought_back_the_gun_control_debate_we_re_debating_it.html

I first learned of the shooting in Roseburg, Oregon, last week by logging into Facebook. But my friends weren’t linking to articles about the massacre itself. Rather, many of them were sharing statistics and charts about U.S. gun violence assembled by various news sites and organizations, Slate included. Must be another shooting, I thought, and soon read the reports of the nine dead at Umpqua Community College at the hands of Chris Harper-Mercer. It was a sadly familiar ritual: The majority of my friends are in favor of gun control, and they post their links. The statistics, as always, show that gun deaths in the United States are wildly disproportionate compared with every other country in the world, that fewer guns correlate with fewer gun deaths, and that guns are absurdly easy to obtain in this country. A few pro-gun people I know argue against the majority of my friends, who then argue back, and no one ever changes his mind. Lather, rinse, repeat.