Complex sentence: Beauvais sees Joan as a threat to the Church, as she receives her instructions from God directly, and fears she wants to instill national pride in the people, which would undermine the Church's universal rule.
Split into simpler sentences: Beauvais sees Joan as a threat to the Church, as she claims to receive instructions from God directly. He fears she wants to instill national pride in the people, which would undermine the Church's universal rule.