Vehemence is a strange choice. He's very mildly spoken, even if impassioned. I'm generally the same. Perhaps slightly louder.
He's not at all narrow-minded.
And he's certainly not intolerant.
Narrow-mindedness won't work in science. Basically you have to follow the evidence. Since there is no evidence for a magical sky man, it's pointless and naive to consider the existence of one. You may as well believe in a whole host of deities or mythical creatures.
I'm not sure about what he is intolerant. Unfortunately religion permeates itself in such a vile way throughout society that much of the dogma should not be tolerated. There's certainly never any cries to be tolerant to other sorts of dangerous beliefs.
Tolerance must not be confused with acceptance of falsehoods. If somebody tells me the Earth is 6000 years old, I'm not being "intolerant" by expressing an absolute refusal to believe that crap, I'm not being narrow-minded either.
Very well said, Adriana. How can refusal to accept a proven falsehood be considered "intolerant?" It just doesn't make any sense. Or, at the very least, it completely perverts any meaning of the word "intolerant."