Just to spell out why I downding, if you can’t see how the idea of having someone who grew up with the more extreme views of a culture/religion in their family decides the best thing to do sis to leave said culture/religion entirely happens to be a massive insult to that religion /culture, then it don’t know what to tell you.
If I had to come up with some kind of an analogy, well here goes…
Let’s assume sexuality is a choice.
I don’t think it is but lets assume it is as much a choice as religion in this particular case.
A character grows up in an extremely promiscuous bisexual family who is into a lot of extremely strange stuff sexually. This convinces the character to become completely monogamous only using the missionary position straight.
A Muslim character deciding to become an atheist just rather than embracing a more moderate view of her faith due to her family’s extremism is throwing the baby out with the bath water.
Also once again it needs to be argued how “rational” a point of view is atheism in a universe where we know for an observable, testable, repeatable fact that Thor (and the rest of the Asgardian pantheon) exist?