The argument should hold regardless of who a person is or what they did. I commented being ignorant of this person's reputation and achievements. But so what? I

The argument should hold regardless of who a person is or what they did. I commented being ignorant of this person's reputation and achievements. But so what? It shouldn't matter. I'm targeting the argument, not the person. I still think his slides aren't great. I wasn't dismissing his weak analysis because of the deck but making the point that he's weakening his own argument with it. And since his points specifically include a lot of comments about the modern web, complete with a rant about frames per second, I think it's a fair point to make.