Why did Nicholas II, the last czar in history, suffer from extermination, instead of exile like other political criminals?

Since he is the last tsar in history, we must talk about his rule. According to reality, Nicholas II was not a qualified monarch, even he was a bloodthirsty and tyrannical emperor. When he first came to power, he held a ceremony, and his people trusted him very much.

So, at this ceremony, many people went to watch it, and then many people wanted to get close to him, but they didn't expect an accident. Because of the pushing and crowding of many people, a terrible stampede happened, and many people died. It is reasonable to say that Nicholas II failed to arrange the scene properly and appease the people, and he must bear a great responsibility, but in fact, he did not. Instead, it was revealed that after the incident, the executioner took part in another party, which made him lose the hearts of the people greatly. Nicholas II, who lost the hearts of the people, did not get a good end. After the whole family was wiped out, in order to destroy the body, the executioner poured sulfuric acid and buried the bodies of him and his family overnight.

Today's historians call Nicholas II's life a tragedy and a victim of that decadent dynasty. That's exactly what happened. Not only he, but the dynasty under the czar was a decadent dynasty. It was thought that Nicholas II's superior position could bring a new era to the people, but it didn't, but it got worse. But I have to say that Nicholas II is a good husband and father. He loves his wife and his son. Maybe he gave all his tenderness to his family, but he didn't treat his subjects well as an emperor should.