The death of a 16-year-old nonbinary student after an altercation in a high school girls’ bathroom in Oklahoma has drawn national attention and outrage from gay and transgender rights groups that say the student had been bullied because of their gender identity.Nex Benedict, who often used the pronouns they and them and told relatives that they did not see themselves as strictly male or female, died in early February, one day after the altercation with three girls at Owasso High School. Details over what happened and what exactly caused Nex’s death were unclear, but in a police…