That was a major reason why France was so unprepared for war in 1940, and folded up as quickly as they did once Germany invaded. There was a strong Communist element within France, the Soviet Union and Nazi Germany were allies at the time, and they interfered with French rearmament at every turn.
Also, there was a strong admiration of Naziism among much of the French population; many saw it as a bulwark against the Communists, and also there was widespread admiration of Nazi Germany’s appearance of order and accomplishment of rebuilding a broken nation.
Also, the French I think suffered so much during WWI that they almost preferred peace at any price. I reread the “Rise and Fall of the Third Reich,” it was either Keitel or Jodl that noted when Germany invaded Czechoslovakia, the French has 80 divisions to Germany’s six or seven on the Western front. If France invaded in response to that attack, Germany and Hitler would have fallen.