The Failure of Jihadi Conflict Resolution - War on the Rocks

A couple principles of war: Objective and Unity of Command.

"Syria has been the epicenter of the conflict between al-Qaeda and its renegade affiliate the Islamic State, and has been the place where the jihadi movement has suffered most from internal conflicts and from the failure to solve them. Two periods of intra-jihadi conflict demonstrate the scale and impact of the problem for jihadis. The first — which started in late 2013 and continued until the fall of 2014 — involved the organizational splinter between al-Qaeda and the Islamic State and the latter’s caliphate declaration. The second began in the fall of 2017 and lasted until the summer of 2020, and covered the contestation between Hayat Tahrir al-Sham and rivaling jihadi groups in Idlib, including Hurras al-Deen, the local al-Qaeda outfit."
Sir,
Why does Mr. Hamming call the Islamic State renegade? It is a direct order from Muhammad to form a Caliphate when there is power to do so.
Once America placed favor on the Shia in Iraq, the JV team, led by two former Iraqi Generals, not only followed Muhammad's orders, but followed other his other orders relating to Infidels and Apostates.
Don't you think, rather than intra group fighting, it is fighting based on which group follows Muhammad and his orders vs those seen as Apostates? For example Shia vs Sunni. Or, Those following Baghdadi vs those who follow the Caliph in Turkey?
I also do not agree this is a Jihdi issue. Isn't it an Islamic issue? Islam is the religious and political system they all follow. Yet, there is in fighting not due to Jihadi differences. There is in fighting due to which leader of Islam they are aliened to?
By all means, arm both sides Sir.