A Brooklyn legislator was accused Wednesday of delivering a bizarre tirade against Jews, while ripping Mayor Bill de Blasio as a sellout, during a local community board meeting this week. Assemblywoman Diane Richardson’s 50-minute rant during the Board 17 meeting Monday night faulted Jews for gentrifying in her district, which includes East Flatbush, Flatbush, Crown Heights and Prospect Lefferts Gardens, according to an eyewitness.