They are just a minority in Islam and they are considered as Kafiroun by the majority of the Islamic community.
{“Legislation is not but for Allah.”} [12:40]
{“And whoever does not judge by what Allah has revealed – then it is those who are the disbelievers.”} [5:44]
“Whenever a person makes Halaal what is Haraam by consensus or makes Haraam what is Halaal by consensus or replaces the Shari’ah that is agreed upon by consensus, then he is a Kafir by the agreement of the scholars of Fiqh.” [Majmu al-Fatawa, 3/267]