I agree, there are plenty of holes in their credibility. I think the reason is that there are plenty of holes in their models of the truth. Like all of us, they only hold pieces of the puzzle and are guessing at what the big picture looks like. Based on the pieces they hold, they become a bit too certain about what the entire puzzle would show if only they had all the pieces.
Exactly. Ego, too. We are all at risk of being ensnared in this trap. In fact, we are all ensnared in that trap already, but in varying degrees. That is the mind control and brainwashing that I am often speaking of. The Matrix has us, all of us.