It was not just bombing, the issue was fire bombing. I think it was Harris who advocated terror bombing in response for German terror bombing. Churchill initially resisted on moral ground and then agreed.
The bombing of Dresden, both Brits and Americans dropped incendiaries along with high explosives. The firestorm was horrific.
Or Curtis Le May on Japan, firebombing and firestorms.
If someone is out to kill you and your family do you defend yourself according to a set of moral rules, or do you do anything to save your life and family?
Dresden was probably unwarranted. We didn't really have a choice with Japan, though, because the industry was so decentralized. Individual targets were so small as to be meaningless to the precision of the day even if they could be identified. The only way to destroy the industry was to destroy the cities.
I see you know your WWII history. Japanese industry was spread out in residential areas.
From interviews with survivors the fire storms were horrific. Wood and paper houses closely packed,
There was a program to tie incendiaries to bats and drop them over Japan. The idea was they would roost in buildings.
There was also the Dam Busters raid. and the skip bomb. The idea was to breach the dams in the Ruhr valley flooding industrial and residential areas where workers lived.
en.wikipedia.org
Japan sent incendiary balloons over the USA trying to start forest fires.
When the breakout stalled in Normandy Eisenhower approved indiscriminate carpet bombing a path through French countryside.
Putin in his mind is in the WWII exi9stentiall anything goes frame of mind. I think the only restraint from, gong too far is the treat of NATO joining in.
When Russia was near Kyiv there were reports of air-fuel bombs. Release an air fuel mixture, ignite it, and it creates a vacuum and toxic gas. Inderscriminate.