Al Qaeda and ISIS, both reviled organizations bent on pushing Islam down everyone’s throats, are now at war with each other.

In a report by the Mirror, during the recent anniversary of the tragic 9/11 attack this 2015, al Qaeda declared their strong opposition against fellow terrorist group Islamic State, accusing its leader of sedition.

Ayman al-Zawahiri, current al Qaeda leader, released an angry audio message via the internet voicing out several reasons why they find the group, especially its leader, guilty of inciting rebellion among their ranks.

Al-Zawahiri, an Egyptian doctor, has served as the group’s leader since Osama bin laden’s demise in 2011. In his speech last September 11, he said Abu Bakr al-Baghdadi, chief of ISIS, has been provoking division by proclaiming himself as the leader of all Muslims.

The declaration didn’t sit well with the al Qaeda leadership. In fact, al-Zawahiri said they were “surprised” with it because al-Baghdadi made the announcement “without consulting the Muslims”.

Originally, ISIS was al Qaeda’s Iraq branch but the group separated itself about 2 years ago. Meanwhile, ISIS has reportedly been “fighting non-stop” with al Qaeda in Afghanistan, Pakistan, and Syria.

Counter-terrorism experts like Matthew Olsen see this as a good sign, and would mean self-destruction of terrorist forces with fewer interventions from opposing forces. Moreover, their differences are quoted to be ‘irreconcilable’ and would cripple both terrorists’ power significantly.