Muhaysini, Abu Taher Al Hamawi, and Abdelrazzak Mehdi worked on the formation of the group Hay'at Tahrir al-Sham.[14] They are members of the group and appeared in its founding declaration.[15][16] However some months later on 8 March 2017 Abdul Razzaq al-Mahdi announced his split from the group in his official Telegram channel as he had not been able to hinder some injustices and did thus not wish to take share in the responsibility. This came in the wake of the Rebel infighting in South Idlib and Northern Hama between Tahrir al-Sham and Liwa al-Aqsa, an ISIS affiliate left over from the late Jund al-Aqsa movement after its fusion. Liwa al-Aqsa had been accused of harassing other groups and kidnapping people as they considered most groups to be apostates, which emanated from their extreme views in takfir.