marilyn zuniga , third grade teacher at forest street school in orange , new jersey , suspended without pay .
she had her students write letters to former black panther mumia abu-jamal who was hospitalized at schuykill medical center in pennsylvania .
zuniga had the cards delivered and they made mumia ` chuckle and smile '
critics say they ` promote a twisted agenda glorifying murder and hatred '
school district said zuniga did not speak with parents or ask permission .
mumia is serving a life sentence after years of appeals won him a reprieve from his death sentence in 2012 .