It wasn't any more "rude" than repeatedly throwing vague insults and insinuations at me without providing the real reason. But I don't see you caring about that. We both know why. Because "rudeness" is not your real concern, your real concern is the same as the other culture warrior, and you're avoiding stating it directly for the same reasons – it's entirely unfounded and indefensible. So instead you go with vague nastyness that you think could be mistaken for something profound and is therefore above criticism (it can't, and it isn't).

If by any chance that is not what you meant to come off as, you may want to reconsider low-effort passive aggressive one liners as your communication medium.