@The Youngest Daughter, the documentary about your dad includes his accusation your family, particularly your mother, is transphobic. The Daily Mail piece in this thread quotes mentions his claim that your mom told him to "stop being trans or leave." A lot of the articles people linked to in this thread sees to paint him as a sympathetic figure rejected because of his gender identity and completely gloss over danger he's posed to the family he left behind.
Learning about your dad's behavior toward you, your mom, and your siblings made me wonder about the damage it could cause if you were hassled by "trans activists" or vilified for protecting yourselves from an abusive relative. Have any "activists" given you grief? Has the whole situation affected your family's opinions about the transgender community? Your dad's victim complex and narcissistic pursuit of self-promotion and fantastic indulgence do more harm than good for a group of people already struggling for acceptance without mentally unstable people hijacking it.