It is no surprise to me that a teenage boy with ASD in the thrall of another teenager would use the pronoun “it” in a WhatsApp chat about a fellow pupil. I know lot and lots of them. They can be blunt, rude, rigid. They can be oblivious. They can not see the logic in things, such as getting gender woo lessons at school and being told you have to refer to a male as “she”. I chatted to a teenage boy once who spent most of the conversation stuck on how ridiculous it was that you get a positive number when you multiply two negative numbers together.
The idea that a boy like this has been “conditioned by society” to use such language is so incredibly shallow. It’s just an example of how ideologists are convinced the world is going along with them and find it confronting when people aren’t, so there must be a nefarious reason.