Do you think bombing civilians is a fair/justifiable act of war??

I do not think that bombing civilians and cities is a justifiable act of war. The civilians cannot defend themself when the other countries are bombing at them.While their opponent has weapons, these people can't fight back because they have no weapons that could hurt them. They should give the big cities enough time to evacuate everyone that is living there. Why should the civilians suffer for the other countries? Even if the othe countires bomb the cities, the civilians are still getting hurt, but indirectly. They would still suffer from whats going on in the city. But if the countries are boombing civilians, more and more of them are getting killed and they can't even defend themself. Bombing civilians is unfair and is not a justifiable act of war.