Encyclopedia Americana:

“Christianity derived from Judaism and Judaism was strictly Unitarian [believing that God is one person]. The road which led from Jerusalem to Nicea was scarcely a straight one. Fourth century Trinitarianism did not reflect accurately early Christian teaching regarding the nature of God; it was, on the contrary, a deviation from this teaching.”-(1956), Vol. XXVII, p. 294L.

In Proto Q Source–historically the most accurate source–Mark 12: 28-32 Jesus affirms Jewish Unitarian Monotheism by agreeing with the Jewish Rabbi and proclaiming the Shema Yisrael the Unitarian Creed. Regardless of Muhammad (ص) Historians maintain that Jesus and his disciples were Fundamentalist Unitarians and did not preach, believe or accept the Trinity. Case Closed.

Professor James Dunn of Durham university, the leading New Testament scholar today in Britain, writes

‘there was no real evidence in the earliest Jesus tradition of what could fairly be called a consciousness of divinity’