For someone who does not care about history, you know a lot of it. You ask the question:
History is witness to the stupidity of Chamberlain, yes. But at what cost?
You and I both know the answer, far too high a price will be paid. Still, history is on our side. In the words of Churchill:
"Never give in. Never give in. Never, never, never, never--in nothing, great or small, large or petty--never give in, except to convictions of honor and good sense. Never yield to force. Never yield to the apparently overwhelming might of the enemy."-- Winston Churchill, 10/29/41