Suber goes on to say that rudeness does not imply falsehood, and in fact, to insulate yourself from criticism on the grounds that your opponent is rude is itself rude.
He goes on The primary type is probably the application of a theory of justified dismissal, such as a theory of error or insanity, to critics and dissenters. Another major type is the interpretation of criticism as behavior to be explained rather than answered. This is closely connected to the type that refuses to see a meta-level in the critic's criticism, and will not allow critics to escape the object-language of the theory... All the types have in common an evasion of a responsibility to answer criticism on the merits, when that evasion is authorized by the theory criticized. All types are triggered only by expounded criticism, and only insulate the proponent from conversion or capitulation, not the theory from refutation.