Real Islam sent by Allah (SWT) through the Prophet Muhammad (SAWA) as the last message for all the mankind till the Day of Judgement is one religion and this fact is clear in Quranic verses. (Verily, the religion by Allah is the Islam)(Sura 3, verse 19).

The Prophet Muhammad (SAWA) never allowed following different sects. He always ordered Muslims to follow the Quran and Ahlul Bayt (AS) to remain in the Rught Path. Those sincere companions who followed that original Islam which was preached and practiced by the Prophet (SAWA) and his Progeny (AS) were named by him as Shia of Ali and he praised them in many Hadeeths narrated un Sunni books as well as Shia books.e,g, of Sunni books  Shawaahid Al-Tanzeel by Al-Haakim Al-Hasakani, V.2, P.356, Kifayah Al-Talib by Al-Kanji al-Shafi'ee, P. 244, Lisaan Al-Milan by Ibn Hajar Al-Asqalani , V.6, P. 243 Hayderabad Dkkin edition.

'Sunni sects never existed during the time of the Prophet (SAWA) but were created and printed by political leaders who wanted to drive Muslims away from Ahlul Bayt (AS).

Following Real Islam can never happen with out following the real Sunnah of the Prophet (SAWA) which is impossible with out following Ahlul Bayt (AS) who narrated the most authentic Hadeeths from the Prophet (SAWA).

The Shia Muslims are the real followers of the Sunnah of the Prophet as many leading Sunni scholars admit and Dr Tijani Smawi has written a full book on this fact. You can see it on the internet (Shia are the real followers of the Sunnah) الشيعة هم أهل السنة.

'Wassalam.