Question

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

Answer 1

People obey orders to not get in trouble and/or to receive rewards. Everyone is responsible for their actions you chose to do what you do

Answer 2

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.