Humiliating personal frisks alienated Algerian Muslims from French rule. [causal]
Germaine Tillion had been particularly disturbed by the little alienating unfairnesses she observed — such as Muslims being subjected to the humiliations of personal frisking, while Europeans were tacitly exempt. Soustelle was also not helped when, playing to the pied noir gallery, Bourgès-Maunoury in a hard-line speech to the Algerian Assembly on 27 May promised that his government "will never look about for what are called interlocuteurs valables. I go still further; I claim that no national government after ours will be able to venture upon this path."
Horne, Alistair, A Savage War of Peace- Alge…, loc. 363