(First time writing. Hi!)
After reading the conversation between Mark Angelo Cummings and Jeanette (it is old news, but I only discovered it recently. See this
Kiwi post), which I believe is real, there is no doubt in my mind that Jeanette filled Jazz's head with all the "I'm a girl" stuff. I mean, I suspected so before - he was diagnosed before he was three, for god sake. But this definitely solidified it. She had been feeding him from a young age this narrative that he always insisted he was a girl and that his genitals are wrong. Even if he said that he is a girl, at the age of two-three this means nothing at all. "...remind her of the facts surrounding certain memories" - this can't be more obvious.
Why has she done it, I don't know; she had three other kids before him, and they were left unscathed (well... presumably). Why Jazz? I guess we can only speculate... Maybe Jazz's pregnancy or birth awaken some deeply psychological issue/condition/disorder that has been manifested this way. Pregnancy and birth can cause depression and even trigger psychosis, so who knows? It's just... so glaringly obvious that all of this comes from Jeanette, not Jazz.