Is publicly denouncing the rulers considered a form of rebellion against them?
Machine translationRead the Arabic original
Question : Similarly, is warning the father of your father considered a type of rebellion?
Answer : According to the statement of the one who says that this man is considered one of the Khawarij, it would be so. Inciting against the rulers is undoubtedly a type of rebellion, but they are not the Khawarij about whom the hadiths came with condemnation, and the scholars agreed that the least that can be said about them is that they are open sinners. They are not those people. Yes.
Answer : According to the statement of the one who says that this man is considered one of the Khawarij, it would be so. Inciting against the rulers is undoubtedly a type of rebellion, but they are not the Khawarij about whom the hadiths came with condemnation, and the scholars agreed that the least that can be said about them is that they are open sinners. They are not those people. Yes.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 225- هل يُعدُّ الإنكار على ولاة الأمور علانيةً من الخروج عليهم؟ - ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.