The U.S. district judge began his 94-page ruling sanctioning the AR-15 assault rifle for home and militia use by equating it with a Swiss Army knife. Yes, you read that correctly. And it’s all you need to know about the quality of the judge’s tortured opinion — even if it is ultimately upheld, heaven forbid, by the conservative U.S. Supreme Court. But come on, that couldn’t actually happen. Right? We’ll probably find out. This is how San Diego-based federal Judge Roger Benitez — the gun lobby’s best friend in recent years — began his opinion: “Like the Swiss Army Knife,...