French colonial prestige eroded after military humiliation in North Africa [causal]
To Muslim minds, particularly sensitive to prestige and baraka, the humiliation made a deep impression. The reaction of many was: "France has had it; so why not pay our taxes to the Germans, instead of to France?" … The population is therefore very poor, and the food and clothing position among the people has caused us all a lot of worry.
XREF: Relates to broader histories of how colonial authority depended on perceived prestige and how rapid defeats — like the 1940 fall of France — unraveled it across empires.
Horne, Alistair, A Savage War of Peace- Alge…, loc. 116