Anyone who can look at the mountain of evidence against soy and totally write it off is the real yahoo. Even if half the anti-soy info is wrong, it should still be avoided or limited.
As for my credentials, in this case I'm wearing the journalist hat because my soy article was an interview with Dr. Kaayla T. Daniel. So what you want is her credentials, not the guy's who interviewed her. You can find those in the "Poison Protein" article.