The Khawarij are the most evil of people and of all creation
وَحَدَّثَنَاهُ أَبُو كَامِلٍ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، حَدَّثَنَا سُلَيْمَانُ الشَّيْبَانِيُّ، بِهَذَا الإِسْنَادِ وَقَالَ يَخْرُجُ مِنْهُ أَقْوَامٌ .
This hadith had been transmitted by Sulaiman Shaibani with the same chain of narrators (and the words are)," There would arise out of (this group) many a group"