"accuses scientists who use an anthropomorphical image (of god) metaphorically... of intellectual high treason."

I think you misunderstood his point here. He's saying that priests who knowingly misinterpret the God metaphor used by scientists to convince people of its existence are committing "intellectual treason". Therefore, it would be better if scientist didn't use God as a metaphor in the first place.

"If you know your enemies and know yourself, you will not be imperiled in a hundred battles." Sun Tzu