Review of The Leftovers: Season 1, with Rob Henderson
There are more black characters in the second season, where it shifts from small-town upstate NY to Texas.
Damon Lindelof likes to include religious themes in his stories, but he's definitely not Christian. I don't know as much about Tom Perrota, but I don't think he's particularly religious. I haven't read his "The Abstinence Teacher" but it seems to be his satire of the religious right.