Even before the firing of Officer Daniel Pantaleo, cops were backing off. Who can blame them? Under de Blasio and the city’s progressive district attorneys — they feel under siege. The disrespect of cop dousings inevitably turned violent when three officers were injured as people hurled heavy objects rather than water. Joseph Imperatrice, founder of Blue Lives Matter, said, "The days of proactive policing are completely done.” Patrick Lynch, Police Benevolent Association boss, urged cops this week to “proceed with the utmost caution in this new reality, in which they may be deemed ‘reckless’ just for doing their job.” Lynch...