Why did the philosophes alienate themselves from the Church?

Question

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The philosophes were often critical of the hierarchical nature and elaborate rituals of the Catholic Church, and believed that reason and individualism should take precedence over blind faith and obedience to authority. They saw themselves as champions of Enlightenment ideals that clashed with the Church's teachings and practices, leading to their alienation from the institution. While some philosophes may have separately held beliefs A, C, or D, it was predominantly their rejection of the Church's power structure and religious practices that caused the divide.

Why Did the Philosophes Alienate Themselves from the Church