To those who think that all people in that movie theatre deserved to die, please read Wikipedia's article about Milgram Experiment.
P.S. Don't use your favorite "speed reading" technique if you choose to read this article. Please read it slowly and thoroughly, with all of the details, maybe several times, and think about it. Thinking will take time.
P.P.S. Перевод на русский - "Эксперимент Милгрэма"