So if I understand you correctly, you're saying once you get to know Dvorak, he really is a jackass.
Let's grant your point. Then still, why call it out? Let's suppose Dvorak is the worst jackass in the history of jackasses. Let's also suppose that anybody who knew Dvorak would agree that he is the epitome of jackasses. Proper response: "Remember when Dvorak did X, Y, and Z? I'm not sure what the situation is now, but this looks like it might be one of those situations."
Why get so emotional? It's just a web column, for chrissakes. The truth was outed almost immediately. Whatever damage happened happened for about 2 hours. Do you guys live some kind of perverse emotional life through these tech columnists? If so, get a life already. Words are cheap. That's why we always ask for links, and double-check sources.
When you call somebody a name, you're attempting to shut down anything useful they might have to offer in the future. It's the ultimate ad hominem argument: no need to listen to anything Dvorak says because he's an X.
I think it's completely idiotic to go there. Everybody has something useful to offer at some time or another.
In those Frankenstein movies there always was a large crowd with torches and pitchforks who stormed the castle looking for the monster. I'm sure there was some guy in the back who was going, "Hey guys, couldn't we just send the sheriff? Why all the yelling and panic?"
I feel like that guy.