It turns out that when you pass laws disarming people in an attempt to prevent violence, criminals who habitually disregard all laws don’t make exceptions for the new rules. In London, crime still thrives despite the U.K.’s tight gun controls and the British political class is now desperately turning its attention to restricting knives.

A flurry of recent headlines reveal that London now has a higher murder rate than New York City, a metropolis of nearly identical population and one long considered more vulnerable to crime. “London police investigated more murders than their New York counterparts did over the last two months,” Reuters reported earlier this month. “In the latest bloodshed, a 17-year-old girl died on Monday after she was found with gunshot wounds in Tottenham, north London, a day after a man was fatally stabbed in south London.”…