The one that first gave me pause to think was calling that diving guy a pedo. That's because, even if you believe it, you don't say it if you have millions of rabid followers, as that amounts to destroying someone's life without evidence. The fact he did that shows his questionable character, his beliefs aside.
After this instance I started paying attention and noticed something also mentioned in the article - he never bothers addressing negative claims, he just attacks the person making the claims. That's when my opinion of him went from bad character to bullshiter and bad character.