David Burns: Why is gun control so hard? A tribalism primer.

(Eric Gay | AP file photo) Gun rights advocates gather outside the Texas Capitol where Texas Gov. Greg Abbott held a round table discussion on Aug. 22, 2019, in Austin, Texas. Abbott met in Austin with officials from Google, Twitter and Facebook as well as officials from the FBI and state lawmakers to discuss ways of combatting extremism in light of the recent mass shooting in El Paso that reportedly targeted Mexicans on Aug. 3, 2019. Why can’t we pass a few sensible gun laws to curb our epidemic of gun violence?

The facts certainly justify immediate action. Each day, an average of 100 Americans are killed by guns and another 300 are shot and injured — a total of 136,000 each year. Almost…