The ruling on one who rebels against the Imam and is called a Khariji

Question:
May Allah reward you. A questioner asks: Is everyone who rebels against the Imam called a Khariji? Or is it necessary that he also holds the beliefs of the Khawarij, such as declaring the one who commits a major sin a disbeliever, and that he will remain in the Fire forever, and so on?

Answer:
The Khawarij have characteristics, among which is rebelling against the one in authority, and declaring the one who commits a major sin a disbeliever. Declaring the one who commits a major sin a disbeliever is the root of their error; they did not rebel against the one in authority except because they declared them disbelievers, disbelievers by the major sin. So the root is that they declare the one who commits major sins, which are less than shirk, to be disbelievers. Branching from this is their rebellion against the one in authority, and branching from this is their making lawful the blood of Muslims. All of this is a consequence of their declaring the one who commits a major sin a disbeliever. This is their school of thought, and the cause of their misguidance is this. We ask Allah for safety. May Allah reward you. Yes. A rebellion. A rebellion. And the one who rebels before that, from before, is part of it. The one who rebels against the one in authority is from the Khawarij. The one who declares the one who commits a major sin a disbeliever is from the Khawarij. The one who makes lawful the blood of Muslims is from the Khawarij. The one who combines these three matters is the most severe type of Khariji. Yes.