Sabotage against an enemy in war is a long-held tradition, and can be a very effective tactic if it causes economic (or other) damage to their enemy. It will still cost less than rebuilding entire cities, but I guess that doesn’t matter as much since it wasn’t (scary hand gestures) sabotage.
This reminds me of when I went to a restaurant with some friends and we had a variety of beers to taste. I’m not a big drinker, and have never liked beer, but whatever, it won’t kill me. So we try 5 or 6, some are better and some are worse, but there’s one that’s far better than the rest. I say, “Well, this one is almost worth drinking,” and they all respond with something along the lines of “Yeah, this one is really good.” That’s when I came to the conclusion that my perception of good and bad were on point for beer, it’s just that my standard for what I was going to enjoy was higher. They can keep their beers, I’ll stick to tastier beverages, alcoholic or otherwise.