I'm not sure I understand what happened. A Facebook friend told you to look up "gender dysphoria' so can I assume she was trying to lecture you on the evils of transgender people?
I used to get a lot of hateful Facebook memes attacking anyone LGBTQ, but after I gave them one private warning, I'd defriend them, one by one, so now there is nobody left that I know about. Or at least, they don't mention it if they have Conservative leanings.
I've never publicly come out as anything on Facebook, but I post a lot of anti-Trump, anti-GOP, pro LGBTQ, pro environment, pro green solutions articles.