Why context still matters when Christians reach for Luke 22:36

Every few months, the debate flares up again about guns and weapons. Even in countries that generally don't have a high level gun issue. Someone, almost always identifying as a Christian, drops Luke 22:36 like a trump card: "Jesus told his disciples to buy swords. He would want you armed today."

It's a compelling sound bite. It's also a textbook case of reading a verse while ignoring everything around it. Don't get me wrong we all do it sometimes. But, in cases like this it is profoundly dangerous.