Don't blame him. I once came across a an atheist forum who where discussing how to plant a false proof into the non suspecting simple Muslims, and after a while of circulating, they tell them hahaha, you believe in nonsense, and using fake evidence.

You seem to be a very reasonable person, however even some atheists are extreme fanatics, and would fake evidence

I can say this: Humans are the same in any system of belief, and would have all spectra of mindsets.

"The larger grows the island of my knowledge, the
longer stretch the shores of my ignorance."
William Blake