EDITOR'S NOTE: This story contains images that feature hate language. Drivers taking Route 1 in Saugus this weekend in were greeted with a hate-filled sign hanging from the Walnut Street overpass that blamed Jewish people for the terrorist attacks of Sept. 11 a day before the anniversary. Photos of the signs that quickly made the rounds on social media showed three masked men standing proudly behind the anti-semitic graffiti. A similar sign appeared in Danvers on Sunday, the 21st anniversary of the attacks. No group has officially taken credit for the stunt, but watchdogs who track neo-nazi groups say the...