This is not true. War materially changes the lives of the people before and after regardless of whether or not their language in customs are noticeably affected in the short term. Would you rather be a West German in 1938 or 1960? What about if you were Jewish?

I think the Jews in France in 1939 would have wished their government put up a better fight and had better generals who actually used the radio.

Also, the statement that France was on the German side is not true. The Germans conquered most of France in the first part of the war and installed a puppet regime that was loyal to them. This does not mean France was on the side of Germany, it means the Vichy puppet regime was.

You clearly know a decent amount about history, yet your analysis is so starkly wrong it appears you have an agenda.