As is often the case in violent wars, there was a fault on both sides of this terrible event. Many died, but of the people listed in the question, the key figure is Jarnail Singh Bhindranwale, a militant who had been invited to take refuge in the holy Sikh temple. He then used the temple as a weapon armory. Indira Gandhi wanted to remove Sikh separatists from the Golden Temple in Amritsar and so ordered Operation Bluestar. Thus, Indian army troops with tanks and armored vehicles attacked, although inviting capitulation first.
The insurgents could have come out unharmed at that point. They left it far too long, and the attack went ahead with over 500 deaths reported, 83 of them from the Indian army. Operation Blue Star is considered a Political Disgrace, and Indira Gandhi was assassinated by her two Sikh guards. Her father, a king of peace - must have turned in his grave.