Dave,
I am sure that the British public did agree the need to stand.

Thank you Dave. Jim and Rag, you have lost Dave's support on that.

I am sure that the German public did agree the need to invade. I an sure that they could not both be right.

I do know that both British and German historians are now clear that Germany was primarily responsible for the war and was the aggressor.
So if the German people supported it, they were duped, deluded or motivated by jingoistic nationalism.