The answer is - as with most things in warfare - "It Depends."
Specifically targeting civilians for aerial bombing is now considered illegal. During WW2, however, both sides considered it a legitimate action, as a valid method to attack enemy public morale and to hurt enemy war production.
In modern times, it is legal to bomb civilians, if they are next to military targets, and the attacker is not intentionally targeting the civilians. In general, reasonable (in military terms) mistakes which result in bombing civilians is also legal.
Regardless of the "legality" of aerial bombings, there is a significant negative Propaganda effect that striking civilians has.
Mainly the debate is over the casualties who were mostly civilians.
It killed many civilians it brougt illness and the devastation.
To try and demoralize the civilian population.
Mostly because of the civilians victims. All Japan's soldiers were dead at the time of the atomic bombs and most of the casualties were civilians.
Opinions differ on this. The bomb did kill a lot of civilians. However, it was an order of magnitude fewer than the official US military predictions of the number of Japanese civilians that would have been killed in a conventional invasion, so in a sort of twisted way, the bomb was actually a more humane choice.
Because Israel cares about civilians and they don't want to kill Innocents
No-one, Bloody Sunday was Britain killing innocent civilians with guns.
Around 80,000.
Mostly civilians, some Japanese soldiers and some american prisioners of war.
Japan was going to surrender soon anyways and it was wrong to put innocent civilians in so much danger and heart ache over revenge. Besides the fact that they chose to use the bomb because it had cost money, the main reason was revenge. They even wrote mean things to the emperor on the second bomb. It was cruel to do that to innocent and unaware civilians.
The population of Hiroshima, Japan on the day the U.S. dropped and atomic bomb on it was nearly 300,000 civilians and 43,000 soldiers. The population of Nagasaki, Japan on the day the U.S. dropped an atomic bomb on it was approximately 240,000.
The forces didn't aim to kill civilians during their bombing missions, they were trying to kill the enemy to make it easier for ground forces to take back the city or area. But civilians were still in the city and along with the enemy getting killed so did the civilians.