NEW YORK — A Jewish man was attacked inside a lower Manhattan Duane Reade store when an innocent bumping erupted into a full-blown hate crime, police said Saturday. The Tuesday morning beating comes as antisemitic incidents across the city have skyrocketed while the Israeli-Hamas conflict in Gaza continues. The 66-year-old victim was leaving the Duane Reade on John St. near Broadway about 9:30 a.m. when he accidentally bumped into a 40-year-old man in a purple and black North Face jacket. “F—— Jew!” the outraged stranger said as he turned around and punched the victim in the head, cops said. T…