"Imagine it happening to your own towns and cities...on a daily basis. Imagine it being done by some other nation like China or Russia, and imagine how you would feel towards them...and how fervently you would support your own government's retaliation and defense efforts in that circumstance."
Some of us don't have to imagine it LH. We were three thousand miles closer to it, and remember it only too well.
I was too young for evacuation, and spent the whole of the Blitz period in London, so I have abiding memories of trips down to the nearest Underground Station, the family cowering under the staircase when the raid came too quickly for us to go to the shelters.
I remember when I was four years old, and out shopping with my mother, watching in amazement all the shop windows flying into the shops as a doodlebug ( V1 ) landed about a quarter mile away. I remember my mother picking glass out of my hair for ages, after we got home.
And you know what? I still don't think it was an unjust war.
Just consider this. As Teribus said above, the first bombs WERE dropped by Germans on London. Passive diplomacy had been tried several times, and at each point Hitler owned a little bit more of the world.
The guy is taking over the western world. There is no question of stopping him without a fight, the only choice you have is WHEN TO FIGHT!
Would you wait until he's standing among your daffodils, bashing your front windows in?
NO YOU BLOODY WOULDN'T!
Neither did we, and before I feel sympathy for the people of Germany, I want to know what happened to the screaming multitudes raising right arms and chanting "Sieg Heil" at pre-War rallies.
They went for thir victory whole heartedly, and lost. Then of a sudden you start to hear "Well, of course we were all against him". Sorry mate, but it won't wash.
The bottom line is, we would have had to fight sooner or later, and we were fighting against the author of Blitzkreig, and if the lightning struck back they've no cause to complain.