"He's a nice guy, but..."

Dr. Martin Luther King, Jr. used to deliver what came to be known as his "but speech" in which he would remind the audience that the word "but" was the one word that completely changes everything that goes before it. For example: “He's a nice guy, but…”

Recently, I read a couple of articles that made me recall that speech. The first appeared in the academic journal Psychological Science and detailed a study in which researchers from Knox College found that male college students who held a gun rather than a child's toy for 15 minutes had elevated levels of testosterone. These students would then add three times as much hot sauce to a glass of water that they knew another test student subsequently had to drink.

The same day, I read a story that appeared in both the Associated Press and the New York Times. It reported that a grand jury in Harris County, Texas, had concluded that a man who gunned down two illegal immigrants who were burglarizing his neighbor's house had used justifiable deadly force and should not be charged with murder.

The shooter, Joe Horn, a retired computer manager, called 911 during the incident and told the emergency operator he saw two men burglarizing his neighbor’s house who were “black.” The operator repeatedly told him to remain in his house and stay calm. Horn was informed that a unit was on the way in response and that there “ain't no property worth shooting somebody over.” Horn would not listen, however. He referred to Texas’ recently enacted Shoot First Law and told the operator “I’m not going to let them get away with this [EXPLETIVE DELETED] … I'm going to shoot. I’m going to shoot ... I’m going to kill them.” A detective had just arrived at the scene when Horn fired three blasts of buckshot from his 12-gauge shotgun into the backs of the unarmed Latino burglars, Hernando Torres and Diego Ortiz, killing them both.

I am sure there is no connection between these two stories, but...