I don't see how my comment on the lack of substance to yours was any more "petty" than your flippant dismissal of Amy's article. If you disagree with the article, a good response would either be to explain how it was wrong and offer an alternative view
or to ignore it. But just saying "I disagree" is about as relevant to the OP as saying "I like pizza." Neither is a commentary on the article — they're both statements of your personal feelings.
Anyway, that's the last I'll say about this. I just wanted to make it clear that I didn't mean to personally attack you — and I'm sorry if it sounded that way — just your comment's lack of content.