That's a classic question with a touch of irony, isn't it? The phrase "What's so civil about war anyway?" is often used to point out the oxymoron in the term "civil war." The term "civil" implies politeness and order, which is in stark contrast to the chaos and destruction characteristic of war. This line, made famous by the Guns N' Roses song "Civil War," captures the absurdity and tragedy of war, especially when it occurs within the same country among its citizens. It's a rhetorical question that highlights the inherent contradiction in waging war in the name of civility or resolving internal disputes. So, in essence, there's nothing "civil" about war—it's a critique wrapped in a bit of wordplay.
Civil war refers to a war between two or more ideologies or groups belonging to the same country. The only civil thing about it is the lack of WMDs and even that isn't a certainty.