If the French and the British had not declared War in 1939 and had sat back to watch Hitler and Stalin duke it out, the Jews of western continetal europe would have been saved. Britian and France going to war in 1939 when Poland was invaded did nothing for Poland and nothing for the Jews living east of the Oder river, and I say this as a man of Polish heritage. Don't forget the Soviets were just as bad as the Nazis when it came to genocide. Stalin murdered about 2-3 times as many people as Hitler. (Of course, Stalin had more time to perpetrate his genocides, so pound for pound they were about equal)