The vast majority of the annual shooting homicides are committed by inner-city and minority youths below the age of 30. Handguns are involved in 80% of all murders. Rifles and shotguns account for less than 10% of homicides. No matter; the National Rifle Association is now blamed for generic gun violence, especially the mass shootings at schools, even though usually no one knows of any proposed gun law — barring outright confiscation of previously purchased firearms, bullets, and clips — that would have prevented the shooters at Sandy Hook and Columbine. Gun merchants are blamed by the president while in...