I am not sure I understand. Ally Lee Steinfeld was allegedly killed by her girlfriend Briana Calderas. Now, Briana Calderas began dating Steinfeld about a week before her death. Presumably, she new that Steinfeld was transgender. Why would she date a trans person if she hated them?
Edit: part in italics changed from “transgender” to “trans person” to comply to the comment below. I had not realised my comment was objectifying, English is not my primary language.
