It doesn't happen in every thread of this kind, but it does happen quite often.
If the OP is talking about someone who has been horrible, insensitive, or plain unkind, there is quite often someone who will suggest that maybe the person has ASD, or something similar.
I don't have DCs with autism, but I do have friends who do, and I find it so sad that it is regularly suggested that someone who is mean or spiteful could be that way due to autistic traits.
I completely understand people wanting to point out that maybe someone has social difficulties, and that people should be considerate even if someone isn't very nice, but AIBU to feel annoyed that it is suggested so often on here?