EDIT: based on the first 3 episodes
This seems to be more of a religious gun fetish wet dream than any kind of serious story. Mostly interesting to watch to see how some part of humanity might think - after all this is no Harry Potter and some folks actually believe this to be reality, which adds a fun twist. Those folks just need to learn how things in reality work - for example that you can not talk back on the announcing system of a supermarket in the parking lot.
And damn - the righteous in the series certainly turn into killers in no time and are able to predict the future.
EDIT: below old review based on first episode
Is it all unbelievable non-sense ... yeah, it is based on the bible so what do people expect? Scientific reasoning?
But it makes for an interesting setup to tell more survival stories with a lot of diversity. And the bible does have plenty of different angles to explore to make for interesting fantasy.
This is based on just the first episode and so no idea where they will take it, but the setup is solid. If you are okay with slow-ass zombies in the Walking Dead somehow beating the militaries of the world, then this is easy to swallow too.
Will keep watching! Hope the stories will match the whole setup.