New Yorkers should thank Ohio Rep. Jim Jordan for helping (unwittingly) remind the country how safe their metro area is compared to his own. Did he think that no one would note that there are 15.4 murders for every 100,000 people in Columbus but only 5.2 in New York City? Or that Ohio’s murder rate is almost twice that of New York State? But let us not knock Columbus. It has a reviving downtown,…