In “Shooting an Elephant,” why does Orwell act against his better judgment?

He was once told that a rampaging elephant is a bad omen.
Orwell has been brainwashed to do exactly as the Burmese people say.
Orwell realizes that if he walks away without killing the elephant, he will be laughed at by the natives.
Orwell desperately wants to get home to be with his family.