unquestioning

US /ʌnˈkwes.tʃə.nɪŋ/
UK /ʌnˈkwes.tʃə.nɪŋ/
1.

Unquestioning obedience is total, and given without thinking, asking questions, or doubting:

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Like all tyrannical leaders, he demanded unquestioning obedience from his followers.