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You have just used the "Tone Argument" which derails the argument. It's a common response (it's in Derailing for Dummies http://www.derailingfordummies.com/complete.html#angry ). Please try to stay on topic.
You're right, but for the wrong reasons. There's no such thing as a "tone" argument. Recall your freshman year Greek rhetoric course -- what are the three main elements of argumentation? Logos (logic), pathos (appeal to emotion), and ethos (morality or "greatness" of character). If you start yelling at someone, chances are you're going to destroy your pathos and ethos. Being persuasive involves more than just logos,…
Think of "tone argument" like "ad hominem", it's a reply to what someone says, but you don't actually respond or address what they said, instead you address how they said it in a very angry manner ("tone argument"), or based on what sort of person they are ("ad hominem")