Maybe someone reported your account/consecutive posts and the moderator handling the deletion forcused on your account post history?
That was a possibility I had considered. I had a feeling that a moderator went through posts from several accounts and not just mine and maybe did the same in other threads but without any member reporting the matter, it is a theory. (That was before reading LoyceV below).
Very unlikely. A mod probably isn't going to go out of their way to find more work to do. It's usually just down to whatever reports come in. Sometimes people use bots to report posts and sometimes users just go on reporting sprees. Sometimes I think users do this maliciously IE they don't like a particular person so they go out of their way to report infringing posts etc.