Within the Aum Shinrikyo Movement of Japan,killing Ordinary People in the Subway

Within the Aum Shinrikyo movement of Japan,killing ordinary people in the subway was seen as justified because the members saw Japanese society as evil and hierarchical.Why was the killing not seen as wrong by the people in the movement?

A) because the Japanese state really is evil and hierarchical
B) because they believed that death freed the victims from accumulating any more negative karmic debt incurred by living in a sinful society
C) because they believed that anyone who spent time underground accumulated sin
D) because they viewed themselves as heroic,and thought the killing was justified as the only way to oppose the Japanese government