Its a story about the murder of nuns. I'm not sure what the other side to the story would be.
This is actually a minor incident. There were several major massacres committed against the church during the Spanish Civil War.
Of course, when the so-called "republicans" weren't busy shooting nuns, they were shooting each other. I think its fairly clear they spent more energy killing each other than they did fighting Franco.
Orwell wrote a pretty good book about his experiences. He was with the "republicans" and he barely made it out alive when they decided he wasn't sufficiently reliable.
Its a story about the murder of nuns. I’m not sure what the other side to the story would be.
When the republicans gained power they decided that the government should no longer pay the clergy but that should be the Churches responsibly.