The ruling on those who declare the Muslim rulers disbelievers through a general declaration of disbelief, and the advice to them

Question:
He says: Honorable Shaykh, may Allah grant you success, those who declare all Muslim rulers disbelievers through a general declaration of disbelief, are they considered among the Khawarij? And what do you advise one who sits with them? And does a person sin if he boycotts them or reports them?

Answer:
This is the position of the Khawarij without a doubt. So he should advise them and clarify the matter. Perhaps they are ignorant, and they say this out of zeal, and forbidding evil in their opinion due to their ignorance. So he clarifies it for them and explains it to them. If they respond, praise be to Allah. If they do not respond, he distances himself from them and does not sit with them. As for reporting them, if there is a possibility that harm will come from them to the Muslims, he reports them. But if it is merely that they argue among themselves and have not taken up weapons or made plans that harm the Muslims, he does not report them. Yes.