If your assessment is that my comment was to express aggression, that would be correct. I thought about what I was trying to achieve and I felt that I didn't owe the OP any grace, since he failed to extend grace to the author of the post. My goal was to express how I felt about the OP's comment as directly as I could, so they could perhaps consider it the next time they want to make another comment like that. Whether or not being less aggressive would make my point more useful is a separate discussion, but at the time of writing the comment, I opted for a bit of aggression.
And FYI, I've not spoken at any conference and I have no interest in speaking at one, so I don't think the comment was directed at my demographic, I just found it to be distasteful.