Originally posted by: 91TTZ
Hindsight is always 20/20. At the time it probably didn't seem like a threat. He had to be doing something right if every major power tolerated his actions.
I think that's at least partly incorrect. Britain, in particular, was dealing with a lot internal issues and didn't believe they could commit to a land war in Europe. To a large extent, this may be true, Britain may have been unable to commit sufficient land forces to wage a war in Europe. France was unwilling to act without Britain's help. As much as France may have wanted to act, the country was not willing to engage in another war after the devastation the First World War brought to northern France.
At the same time, many in Europe also believed in the spirit of the Fourteen Points, which Hitler used to push his own agenda. He spoke of uniting the German people, which had been a main purpose behind the redrawing of borders under Versailles. Basically, he played everyone using a script they had already written.
One major reason for the "Appeasement" was that the victors of WWI had come to realize that the restrictions placed on Germany were too harsh to begin with. So you had a bad combo of one side feeling guilty about the harshness and wanting to lessen it, but ultimately not really doing anything about. Then you had the bitter Germans as a result of that harshness and the manipulative/charismatic Hitler with bitterness and plans of his own.
The Treaty of Versailles set the stage.
Certainly many of the victors thought that Germany should have some of the territory it demanded, but the reasons for appeasement were far more complicated and lay primarily in economic conditions in Britain. As I said above, Britain knew the empire would be unable to commit forces to Europe without doing near-critical damage to the empire's integrity. The choice to follow appeasement was one made in order to save the empire -- if Hitler could be appeased then Britain would not have to wage an expensive war in Europe and could concentrate on maintaining the empire. France, as stated before, would not act without Britain's help because they, too, feared a long protracted war waged on French soil.
While Versailles might have set the stage for Hitler, the depression that hit in 1929 through the mid-1930s was the catalyst for both Hitler's rise and the "Allies' / Entente's" unwillingness and to engage in a direct conflict with him.