Imaam Muhammad Ibn Saaleh Al-Uthaymeen (rahimahullaah) said:

There is nothing in the Book or the Sunnah that allows different groups and parties; rather that has been censured in the Book and the Sunnah. Allaah (The Most High) said:

فَتَقَطَّعُوٓاْ أَمۡرَهُم بَيۡنَہُمۡ زُبُرً۬ا‌ۖ كُلُّ حِزۡبِۭ بِمَا لَدَيۡہِمۡ فَرِحُونَ

”But they (men) have broken their religion among them into sects, each group rejoicing in its belief.” [23:53]

And there is no doubt that these parties oppose that which Allaah has commanded. Allaah (The Most High) said:

إِنَّ هَـٰذِهِۦۤ أُمَّتُكُمۡ أُمَّةً۬ وَٲحِدَةً۬ وَأَنَا۟ رَبُّڪُمۡ فَٱعۡبُدُونِ

”Truly! This, your Ummah [Sharia or religion (Islamic Monotheism)] is one religion, and I am your Lord, therefore worship Me (Alone).” [21:92]

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[Source: Fataawaa Al-Muhimmah Fee Tabseeril Ummah. Page:120]