is a very irrational person

Fundamental Attribution Error? The heuristic of being mindful of the word "is" seems useful here.

Also, I read a lot of my old posts and cringe. If I saw a similar post by somebody other than myself, I would dismiss them as hopelessly irrational. Thus, I'm less quick about dismissing people as irrational.

But, I do agree that his reputation probably has contributed to how well received his posts are.