Britain and French do not re-intention of hitler who was a preparedness
It was a selfish policy as Britain and France above that of the international community
It cause fear among the small power who could not relied on Britain and France for security while the policy was abandoned.
It did not have the support of Russia.
German occupation Zechoslovaka who prouved to Britain and France that hitler was sicking to dominate Europe
Compare with early year of 1918 Britain and France had imposed military preparation.
The signing of the German Russia a path in August 1935 demonstrated to Britain and France that hitler had done objective to dominate Europe and the whole world.
Britain and France had to declare war on German when Poland was invented in September 1931
The aggressive foreign policy of German handed public opinion in Britian and France against them and the were force to resist the German by force.