Perhaps so, if my house was under attack. But striving to build a functioning peacable society with your neighbours has a lot more promise than assuming they—and the government—are out to get you, and that your only hope is to be armed against them.Sure. In the meantime, there were four masked men trying to burn down a house, and his family were inside that house. Would you have stood waiting for the police? I bet you would have used whatever means were at your disposal to try and chase the attackers away before they killed your kids. I think anyone would. He happened to have a firearm at his disposal.
In fact the back story to this particular incident suggests it was the latest in a string of hot-head confrontations amounting to a feud. At this point, with arson and weapons charges flying about, it's clear the armed response/castle doctrine lead these guys into trouble instead of protecting them.