If I'm dealing with someone who doesn't think politics, the mind killer, requires an effort towards calm and careful thought, and has beliefs primarily as attire rather than anticipation controllers, and who doesn't understand that policy debates should not be one sided, and who is dealing with non-allied interlocutors by assuming they are innately evil and pattern matching them to evil groups with heavily motivated cognition, and sometimes reasons that enemies are innately evil in violation of conservation of evidence, and sees a negative halo around any concept within shooting distance of the point I am trying to make, and doesn't strive to think non-cached thoughts, then the truth is that I automatically know s/he's wrong.

Agreed, one must be careful when dealing with non-rationalists. However, Vladimir_M was talking about blogs where people who were already sufficiently rational not to get mind-killed by the topic got together in an attempt to find the truth, as opposed to blogs like HughRistik's that focus more on appealing to people who aren't yet rational.