Khariji

noun2

1. •
   (historical) A member of an early Islamic sect who initially supported Ali, but then seceded from his army.

   • His keynote speech was delivered on his arrival, incognito, in al-Kufah, which at the time was a focus of Khariji dissidence. — 2019
2. •
   (disapproving) A member of an Islamist terrorist organization, such as the Islamic State or al-Qaeda.