A parent who lost a kid might well blame God. I'm reading there was ample warning broadcast, the issue is it was initially ignored and then the water rose much faster than anyone would have guessed. I can see folks thinking they are well above any flood level, and then it happens once in a century, like Helene.
I know a lot of those towns pretty well that Helene flooded, it was ... incredible. You live in a place (or in my case pass through) for decades and can't believe that "river" could get that high ever.