Further Musing, and No Answers

The Second World War was the most powerful event of the 2oth century; so powerful that it results in placing us where we are at this moment. One shudders upon considering that if the Dark Side had won, a new Dark Age would have emerged.
My thoughts wandered from elemental ironies to unanswerable questions:
After the Allies had been expelled from Europe in 1940, and Hitler poised for invasion of the British Island, we know that some 336,000 British and French troops had been rescued and brought back to England, to fight Fascism another day - how and why did that happen?
The German military machine, the most powerful in history up to that time, had dashed across France in less than six weeks, and were pounding toward the Channel when an order from Hitler stopped this dash east of the town of Dunkirk. A number of the German generals were astounded at this order. This action allowed the British to rescue those men, a third of a million, and bring them back to the safe harbors of England.
Much speculation has come forward from this event. Some say that Hitler stopped the tanks, because of the marshy nature of the land mass before Dunkirk, and relied upon the air force to complete the destruction of these men, which obviously did not take place.
Another more interesting speculation is that Hitler might have stopped his army in order to placate the British into forging an ultimate alliance with him - it was known that Hitler did not want to fight Britain, at least at that point in time. If that were the case, he certainly did not understand the implacable hatred that Churchill held for Hitler, calling him publicly at that time, a "guttersnipe."
We may never really know why this event occurred as it did.
In leashing his unprecedented Blitzkrieg against Western Europe, and ultimately the Soviet Union, we know that much of the technique of "lightning war" came from a book written by one of Hitler's generals, Heinz Guderian.
One should also be reminded that at the same time, the Germans were avidly going over a very important book written by a then obscure French colonel , Charles De Gaulle, which dealt with tank tactics, which the Nazis later inculcated into their Blitzkrieg. How strange; the French ,with their Maginot Line,had always thought of defensive war, while one of their own formed visions of future war tactics that the Germans used to defeat the French in 1940.
How about the painful ironies, such as the bombing of Coventry?
Churchill had broken the Enigma code of the Germans, and knew, through this code, that the Germans were planning on destroying the beautiful cathedral city of Coventry. Churchill had to endure not letting his own people know that Coventry was to be bombed, as he knew that if the English were to have been notified about the coming attack, Hitler would have realized that his code had been broken; therefore, Churchill had to endure the coming Hell he alone could have prevented.
Another painful decision involving Churchill - that decision to destroy the French fleet. He knew that if Hitler had taken over the French fleet, the third strongest in the world, after his occupation of France, that the combined French, German and Italian fleets would have ruled the oceans and would eventually have starved the British into surrender, and the United States would have been totally isolated.
And so Churchill "endured the unendurable" (as Hirohito once said after the Bomb leveled Nagasaki), and ordered the destruction of the French fleet, killing many French sailors in the operation.
Is there a form of insanity greater than War?