In the 90s I read a collection of short sci-fi stories. One that made an impression on me had the premise of angels fighting humanity to destruction. God had gotten sick of human kind, and like a story out of the Bible or ancient myth, he was killing all humans (again). I believe it was first published in the 70s, but I could be wrong. Certainly before the 90s.
The story was told from the point of view of a priest or pastor (I believe he was a Lutheran pastor, but I could be mis-remembering) who didn't buy the theory that it was angels who were fighting humanity; they were just aliens, and God still loved humanity. He hadn't abandoned his faith.
As I said, it was a short story, and as I recall, the pastor hooked up with a group of people who were on the run to escape the destruction. Over the course of the story, he changed from his religious faith motivating him, to fighting and dying alongside his fellow humans as the basis of his beliefs. A change from believing in an impersonal (and possibly hostile) God to a belief in his fellow human beings.