I don’t think it’s really unstoppable, just very difficult to stop. There’s been a steady reduction in religiosity for years in most western cultures [1], even middle eastern countries are showing signs of less religious belief [2]. A good question might be why this is happening.

[1] https://blog.oup.com/2020/12/why-is-religion-suddenly-declining/
[2] https://www.dw.com/en/middle-east-are-people-losing-their-religion/a-56442163