What do Muslims Think about the Trinity?

Islam strictly rejects the concept of the Trinity, which is the Christian belief that there are three co-equal persons in one Godhead – the Father, the Son (Jesus), and the Holy Spirit. Muslims firmly believe in Tawhid (belief in the Oneness of Allah) which asserts that there is only One God Who governs this universe. 

In Islam, associating partners with Allah (Shirk) is a great sin and ascribing divine attributes to anyone other than Allah is considered blasphemy. The Quran emphasizes that Allah is One God Who has no partners, offspring, or associates and affirms His Oneness throughout several ayahs. Hence, according to Islamic beliefs, any form of polytheism or tritheism is considered unacceptable and goes against Tawhid.