We obviously have different ideas on what constitutes manners. Asserting that someone you disagree with didn't read the article and should be downvoted hardly counts as polite.
I didn't expect this to turn into a flamewar and I'd never attempt to engage into one. But, attacking authors of articles without good points, is what made me write the comment the first place. That's why I asked why others are agreeing? If I am missing something.