The local trans group steals your child’s possessions to sell them themselves. They show that the group cares nothing for your child and is busy going on to indoctrinate the next victim.
Deconstructing this to the best of my ability: The (adult) child is miserable and the family is really not helping, so they leave (or occasionally, get kicked out). The family assumes that the child identifies as trans due to social contagion or grooming or whatever, and that’s the real reason why they’re miserable, and now the evil transes have drawn them into their crab bucket to become one of them. Due to very limited (or no) contact, the family assumes that things are only getting worse for them, and even if the child says otherwise they don’t believe it. If the child dies in an untimely matter (something seen as nearly inevitable, which made a bit more sense back when murder or suicide was a higher risk for trans people, ignoring that it probably wouldn’t have been any lower if they hadn’t left) then whatever they own will go to their chosen family, not their bio family - those absolute vultures.
This narrative is pretty-self consistent. Too bad it’s disconnected from reality.