After doing some research, according to know your meme, it was originally posted on this reddit thread (archived version for those of us who enjoy reading deleted comments).

https://www.reveddit.com/v/copypasta/comments/jrzsyl/you_will_never_be_a_real_woman/

Also, one of the comments left a bunch of interesting links, so I'm posting them here for archive:

Want a list of sources that prove that most lgbtq members are predators?
No? Too bad :)
https://williamsinstitute.law.ucla.edu/publications/lgbtq-sex-offender-registries/
https://www.taylorfrancis.com/books/edit/10.4324/9780203411773/sexual-offending-children-tony-morrison-marcus-erooga-valerie-howarth-richard-beckett
https://pubmed.ncbi.nlm.nih.gov/9676497/
https://pubmed.ncbi.nlm.nih.gov/6512871/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3310141
https://www.tandfonline.com/doi/abs/10.1080/00926239208404356
https://www.sciencedirect.com/science/article/abs/pii/0145213495000173
https://www.tandfonline.com/doi/abs/10.1080/00926238408405949