A hammer-wielding maniac was arrested at a Queens Jewish school on Tuesday morning for allegedly menacing a woman with the weapon and shoving an 8-year-old child, police reported. Sources close to the investigation said the disturbing incident occurred just before 10:50 a.m. on July 28 at the Jewish Institute of Queens, located at 60-05 Woodhaven Blvd. in Elmhurst, which serves students from pre-kindergarten through 12th grade. Law enforcement sources said the perpetrator, a 42-year-old emotionally disturbed man, allegedly wielded a hammer while chasing a woman into the school off the street and into the school. Although she fled into a Jewish...