this is, according to the wikipedia page on selective mutism, a method of treatment.
snatching items from a child, things that are special to them, and forcing them to do the thing their disability prevents them from doing in order to get it back, is seen as treatment. not ableism bordering on child abuse, it’s a method of treatment. or so im supposed to belive.
seriously FUCK you if you believe this is a good way to treat children with selective mutism