Frederick makes a valid point. It was the expansionism of Germany which was the main cause of WWII. Germany under Hitler invaded Poland, Austria, Denmark,Norway, Netherlands, Belgium,part of France,eastern Europe and were on the borders of Russia. Japan joined hands with Germany and invaded China, Korea and Burma. Italy under Mussolini invaded Ethiopia, France, parts of Africa. The holocaust was a separate issue and was made a pretext by Hitler to mobilise the german people against an imaginary enemy.
Regards, Marshall