Autist here:

Its probably because growing up we feel like we don't fit in, even with people who love us. So when we find a place we feel we fit in, we latch onto it in a deathgrip, especially where community is involved.

It'll typically revolve around trendy things because its easy to feel like you 'belong' there, since its popular. You might remember My Little Pony being a somewhat similar trend to the trans movement for a bit, minus the morality policing. Had to shove themselves into EVERYTHING.

Once we enter any given rabbit hole, its years before we come out, especially if things are further validating us being a part of it. The trans community is near-obsessed with providing validation to the trans identity, even for rapists.

Probably not everyone's story, but that was basically my experience growing up, just with things that weren't being trans, and I see this reflected in the obsessive, zero self-reflection behavior of many trans people online.

Also, its actually more autistic women identifying as trans, IIRC, but that's only because they're too retarded to realize that non-binary and transness aren't the same thing. The MTF ones never seem to be sane.