I think that the reasons for the appeasement in 1938 are reasonably clear, ie why Chamberlain ceded to Hitler's demands:
Effects of World War One, Treaty of Versailles, Lack of Allies and Hitler's cleverness all contributed to it,
There were many reasons why Britain 'appeased' Hitler in the 1930s. Historians have ascribed every possible motive to Chamberlain - sheer abject cowardice, that he was duped by Hitler, that it was a noble attempt to prevent bloodshed, that he was buying time for Britain to re-arm... and many others!
The five most important reasons, however, were:
Some British people approved of Hitler's policies.
The British people hoped that a strong Germany would stop the growth of Communist Russia.
Many people felt that events in Europe were not Britain's business.
Many British people wanted peace.
Many British people agreed with Hitler that the Treaty of Versailles was unfair.
I must apologise to Captain Nemo, seems the thread you started with the destroyer depth charging has taken on a different spin now, sorry for getting off-topic?