They’re not mindless robots. Bomber Command were aware of their circumstances and that Germany was the aggressor and caused the war but they also knew what they were doing. I happen to think the bombing of Dresden was a disgrace and maybe the darkest day in modern British history and there were questions ringing around the government and BC before it happened, from top down.That's a hard decision to make.
You're in a foreign country, frightened and away from your surroundings, an enemy all around you and then the consequences of your actions for you and those back home.
I'm sure most don't get any satisfaction from shelling civilians, much the same as many bomber crews in WW2 didn't get satisfaction from raining bombs on German civilians. Many struggle to live with it afterwards, but at the time, the job still gets done.
As I sit in my comfortable warm living room with my coffee, I realize just how fortunate I am.
I personally think if you find yourself in a situation where your target is fleeing civilians then you do not follow orders and you face the consequences like a man.