Why do people obey orders that are unjust or immoral? Are they responsible for their
actions?

In everyday situations, people obey orders because they want to get rewards, because they want to avoid the negative consequences of disobeying, and because they believe an authority is legitimate. ... People justify their behavior by assigning responsibility to the authority rather than themselves.

a case involving the laws of a single state.

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.