As a Christian who doesn’t follow much of the super religious “rules”, I think it’s kind of a red flag but sometimes it’s not. Red flag because my girlfriend’s ex-friend was super devout and put it all over her bio and was very ableist and homophobic. My friend, for example, is agnostic, so he’s not sure if spirituality exists. He has a friend who’s super devout and constantly talks about Christianity. She has a Discord server about Christianity and most of her friends are Christian who just talk about Jesus and God all the time. She puts the crosses and bible verses in her bio too. She’s very nice and tries to be accepting but seems kinda judgmental or like “Oh, your non-traditional ways are… nice I guess.”
She constantly asks my friend how his relationship with God is and if he reads the Bible and what his favorite verses are, even when he says he’s not super religious.
My mom as of recent has become super religious, and while she is pretty left-leaning, thinks the only way to believe is to be Christian and you HAVE to believe in Jesus or you’ll die instead of live forever in Heaven.
I guess I’d describe myself as agnostic, but I find them to be annoying, generally. This includes my grandmother who must bring up God in every conversation. Weather? God. Politics? God. What people are up to? God. Her particular flavor of “Christianity” involves judging others, so the shit she spews isn’t taken very seriously in our house. If I were in your friend’s shoes, I’d probably just distance myself from this friend of his, since she doesn’t really seem to respect him.
I like to discuss religion and people’s particular beliefs, mostly because it’s fascinating how different groups and cultures have decided how to get through life with ultimately the same conclusion. But it’s hard to do that when someone’s view of the subject is voluntarily one-sided. I think it’s ignorant to claim your religion as the way to believe, and the only way to get to some so-called heaven or afterlife.