والمقصود أنهم سنّوا في الإسلام سنةً سيئة ،وجعلوا الخروج على حكام المسلمين ديناً على مر الزمان والأيام ، رغم تحذير النبي صلى الله عليه وسلم منهم في أحاديث كثيرة ، منها قوله صلى الله عليه وسلم الخوارج كلاب النار.ورغم أنهم لم يروا كفراً بَواحاً منهم ، وإنما ما دون ذلك من ظلم وفجور وفسق . واليوم والتاريخ يعيد نفسه كما يقولون- ؛ فقد نبتت نابتة من الشباب المسلم لم يتفقهوا في الدين إلا قليلا ورأوا أن الحكام لا يحكمون بما أنزل الله إلا قليلا فرأوا الخروج عليهم دون أن يستشيروا أهل العلم والفقه والحكمة منهم بل ركبوا رؤوسهم أثاروا فتناً عمياء وسفكوا الدماء في مصر وسوريا , والجزائر وقبل ذلك فتنة الحرم المكي فخالفوا بذلك هذا الحديث الصحيح الذي جرى عليه عمل المسلمين سلفا وخلفا إلا الخوارج

And the intent here is that they instituted an evil way (sunnah) into Islam and made revolting against the ruler to be an act of devotion (deen) over the passing of time and (passing) of days despite the warning of the Prophet (sallallaahu alayhi wasallam) against them in many ahaadeeth, from them, his saying (sallallaahu alayhi wasallam), "The Kharijites are the Dogs of Hellfire." And despite the fact they did not see clear, plain manifest disbelief from them (the rulers), but only what is less than that of oppression, tyranny and sin. And today, history repeats itself as they say, for there has emerged a new band amongst the Muslim youth who did not understand except very little of the religion and they hold that the rulers do not rule by what Allaah has revealed except little, and they held [the obligation] of revolting against them without consulting with the people of knowledge, understanding and wisdom. Rather, they followed their heads, kindled blind tribulations, and shed blood in Egypt, Syria and Algeria, and prior to that (was) the tribulation of the sacred precincts in Makkah. Through (these activities) they opposed the authentic hadeeth upon which all the Muslims, the earlier ones and the later ones abided by, except for the Kharijites.

Refer to al-Silsilah al-Sahihah (7/1240-1241).