I was infact making a rhetorical point. The main issue leading to WW2 was the actions of the allies post WW1. Most Germans in the 1920's had no job, no food, they simply couldn't provide for their families. Of course they went out and voted for the man who said he could change that, and in fact did change that for a while. If that was the situation in the UK most of us would vote for him as well.
Perhaps making "all" people guilty and subject to harsh penalties might not be the answer if we use that point in history as a learning tool.