Do all Christians believe Jesus was God or Son of God?
The early Jewish-Christians such as the Ebonites, the Cerinthians, the Basilidians, the Capocratians, and the Hypisistarians. The Arians, Paulicians and Goths also accepted Jesus as a prophet of God.
Even in the modern age there are churches in Asia, in Africa, the Unitarian church, the Jehovah's witnesses, and even the majority of todays Anglican Bishops do not worship Jesus as God.