Case: An authority issues one lawful administrative instruction and another that explicitly requires a sin. Someone treats both as equally binding.
لَا طَاعَةَ لِمَخْلُوقٍ فِي مَعْصِيَةِ الْخَالِقِ
No creature may be obeyed in disobedience to the Creator.
Lawful obedience to authority remains important, but it is limited by Allah’s commands. Refusing a particular sinful order does not authorize rejecting every lawful instruction. Evaluate the content of the command separately from the status of the commander.