Yes, we all follow one Quran and recognize the finality of the Prophet. as well as the five pillars. So let us focus on them and this exactly what the people who do not identify with any denomination want to do.
There are eight recognized madahib in the Muslim world today. Some 200 Muslim scholars in 2005 agreed on the following three points.
They specifically recognized the validity of all 8 Mathhabs (legal schools) of Sunni, Shi’a andIbadhi Islam; of traditional Islamic Theology (Ash’arism); of Islamic Mysticism (Sufism), and of true Salafi thought, and came to a precise definition of who is a Muslim.
Based upon this definition they forbade takfir (declarations of apostasy) between Muslims.
Based upon the Mathahib they set forth the subjective and objective preconditions for the issuing of fatwas, thereby exposing ignorant and illegitimate edicts in the name of Islam.