First up I'm an atheist.

Really weird to see people admit to blatantly discriminating against people who have a religion.

In the UK what you're describing is unlawful.

> but the indications I get from those statements are that this individual ultimately hasn't progressed very far intellectually or challenged their beliefs strongly enough. I fear it is a limiting mindset,

Can you see that here you're doing exactly what you describe people with a faith of doing? You're not examining nor challenging your beliefs.

You'll say that you haven't met many scientists who also have a faith, but you're not examining why people with faith don't want to tell you about it, and how that factors into your confirmation bias.