While I wouldn't buy into Dave's alternative history scenario, he's dead right in emphasising the impossibility of being confident about any one of the uncountable "options".

Maybe the Oster Conspiracy by dissident conservatives generals to kill Hitler and stage a coup if a war on two fronts erupted because of the Sudetan would have come off.

Change the past and it might come off better, it might have come off worse. Nobody can know that stuff.