A little bit of discrepancy to the article, because Netflix often claims a movie or series is "A Netflix Original" when it's anything but. This could have easily given some a wrong impression about who made the series. Still, personally I think shows like this do more to focus on religion rather than to take focus away - seems silly to protest something that is promoting at least in some sense the things you like, just because it doesn't represent it precisely to your liking.
Silliness is their stock in trade. Without, who would they recruit?
You could say it was ... foreordained.
foredained
Not that it matters much overall, but, amusingly, Netflix doesn't even have anything to do with Good Omens. The group addressed their concerns to the wrong party. It's an Amazon Prime show.
The group protesting it is called "Return to Order". Just at first glance, that choice of name is repugnant. It's like an unholy mix of Christian Right / Moral Majority + authoritarian echoes of the past all in one. Gross.
They are indeed a theocracy-promoting group, as one would easily suspect.