4 stabbed to death, including girl, 11, and boy, 12, by relative fatally shot by NYPD cops outside burning Queens home

A crazed killer stabbed four relatives to death, including an 11-year-old girl and a 12-year-old boy, and then wounded two NYPD cops before they fatally shot him outside his family’s burning Queens home Sunday morning, police said. Cops raced to the home on Beach 22nd St. near Elk Drive in Far Rockaway about 5:10 a.m. after a young girl called 911 to say her cousin was “killing her family …