Your interlocutor is posting from Indiana. Usually Indianans are better-disposed, and certainly better-mannered, than this guy, who by his demeanor is probably from someplace like New York or New Jersey. Just a WAG.
He probably has a complex psych history and profile, which being nice people we don't want to get into judging, so just ignore him and eventually he'll go off and micturate on something else.
Thank you for your most helpful remarks. I am mentally fanning myself with a handkerchief after dealing with the nastiness that man expressed. I just wish that the sort of thing he wrote represented a rare perspective, but after living in New York and Illinois I know that it's not rare at all.