Two sicko siblings with 50 prior arrests were busted Friday in the slaying and robbery of a feisty Holocaust survivor. Aljulah Cutts, 27, was one of two killers inside the upper East Side apartment of Felix Brinkmann when the 90-year-old was asphyxiated during a botched robbery, police sources said. Cutts insisted "he didn't mean to kill Brinkmann, it was an accident," one source said after the arrest outside a Bronx restaurant. His brother, 30-year-old Hasib Cutts, drove the getaway car after the July 29 killing, the sources said. He was arrested in a van near his brother's place.