Abu Uthmaan An-Naysabooree [rahimahullaah] said: Whoever commands himself with the Sunnah in speech and action will speak with wisdom. And whoever commands himself with desires in speech and action will speak with innovation.
Know O my brother! May Allaah grant us and you His Pleasure and make us from those who have awe and fear of Him as He should be feared. Indeed, the flesh of the scholars is poisonous and Allaah’s way of disclosing the hidden affairs of those who diminish their worth is well known.
[Tabyeen Kadhib Al-Muftaree Fee Maa Nusiba Ilal-Imaam Abil Hasan Al-Ash’aree: page 29]
None violates the honour of the scholars who are upon the truth, except one of three [people]: Either a hypocrite known for [his] hypocrisy, or an evil sinner who hates the scholars because they prevent him from his sinful [acts] of disobedience, or a misguided hizbi who hates the scholars because they neither agree with his hizbiyyah nor with his deviated views.
Al-Ajwibah Al-Mufeedah page 51 and Muhaadaraat Fil Aqeedah Wad-Dawa 2/190]
The khawaarij were not misguided and misguiding others with their intellects and fear of Allaah, except that they disassociated themselves from the scholars and depended on their own understanding and that of those similar to them. They took instructions from one another, and thus they caused harm to themselves and to the Ummah. This is the result of disassociating from the scholars.
Allaamah Rabee Bin Haadi Al-Madkhalee [may Allaah preserve him] said:
By Allaah the Ummah will not exit from its problems, the humiliation and degradation they are living in, except by way of returning to the Book of Allaah, the Sunnah of the Messenger [sallal-laahu-alayhi-wasallaam] and the understanding of the Salafus Saalih in [dealing with] the affairs of the khawaarij and others. Imaam Al-Aajurree [rahimahullaah] said: “The scholars do not differ–past and present–that the khawaarij are an evil people, disobedient to Allaah and His Messenger, even if they [perform] the prayer, fast and strive in [carrying out] acts of worship.
[Source: ( الذريعة إلى بيان مقاصد كتاب الشريعة للإمام المحدث أبي بكر محمد بن الحسين الآجري page: 97-98. Vol 1). slightly paraphrased]
In The Name of Allaah, The Most Merciful, The Bestower of Mercy
Imaam Muhammad Ibn Saaleh Al-Uthaymeen [rahimahullaah] said:
The heart of the caller [i.e. the caller to Islaam upon sound knowledge, clear-sightedness, wisdom, etc] should be relaxed towards the one who opposes him, especially if he knows that the one who opposes him has a good intention and has not opposed him except to establish the evidence he possesses; therefore, it is obligated on a person to be flexible in these affairs. He should not make this differing a cause for enmity and hatred, except against a man who opposes the [truth] obstinately after the truth has been made clear to him, but he carries on upon his falsehood; then indeed it is obligatory to deal with him [in a manner] he deserves-by alienating him and warning the people about him- because his enmity manifested after the truth has been made manifest to him and [refuses] to follow it. [1]
In The Name of Allaah, The Most Merciful, The Bestower of Mercy
Shaikh Muhammad Amaan Al-Jaami [rahimahullaah] said: All praise is due to Allaah, our rulers [i.e. Saudi Arabia] handle our affairs based on Siyaasah Shar’iyyah [i.e. the system of Islamic governance founded upon the Qur’aan and the authentic Sunnah]. It is not strange that some people might laugh at you and say: “You [people] live under one permanent rulerhip – ruled by a single person permanently”. And they might even call this a dictatorship!
In this country, neither are we living under a rulership based on parliamentary elections through political parties; nor are we living under a dictatorship- ruled by the sword. [Ref 1] And neither are we ruled by an individual nor a group; therefore what (type of) rulership are we living under? [We are ruled] by Allaah’s Sharee’ah. The rulers of this land are only considered as those who apply Allaah’s Sharee’ah and not the legislators of laws. Neither do we have legislative authority nor it is permissible for that to exist; rather it is not permissible for the Muslims [in their countries] to have legislative authority in order to pass laws besides Allaah’s laws. [Ref 2] In this land, we are judged by Allaah’s Sharee’ah and this is something known, even to the market workers. [Source: Qurratu Uyoonis Salafiyyah Bil-Ajwibah Al-Jaamiyah’ pages 389-390. Abridged & slightly paraphrased]
[Ref 1]: Even if the Muslims are ruled by an oppressive ruler, they must follow the guidelines of the Prophet regarding the manner in which to deal with such a situation. See article by Ustaadh Abu Khadeejah (may Allaah preserve him): http://www.abukhadeejah.com/the-tyranny-of-the-rulers-a-reason-for-rebellion/
[Ref 2]: See this link regarding the judgement on ruling by other than Allaah’s Sharee’ah