Bumbling Bill de Blasio is all thumbs, and not just on Twitter. Slow to respond when Orthodox Jews suffered an unprecedented wave of violence on his streets, the mayor of New York City quickly ejaculated a blanket warning of mass arrests to ‘the Jewish community’ after several hundred members of a Hasidic sect attended a funeral — a funeral, de Blasio now admits, that his office and the NYPD’s commissioned knew of in advance.

My message to the Jewish community, and all communities, is this simple: the time for warnings has passed.