Do Christians believe that Jesus was the son of God?
"For God so loved the world that He gave His only Son that whoever believes in Him should not perish but have eternal life. For God sent the Son into the world, not to condemn the world, but that the world might be saved through Him (Bible: John 3:16).
However, it is interesting to note that the term "son of God" is used in other parts of the Bible to refer to Adam (Bible: Luke 3:38), Israel (Bible: Exodus 4:22) and David (Bible: Psalms 2:7) as well. The creatures of God are usually referred to in the Bible as children of God.
The role of Paul of Tarsus in shaping this belief and the belief in Trinity
The notion of Jesus as son of God is something that was established under the influence of Paul of Tarsus (originally named Saul), who had been an enemy of Jesus, but later changed course and joined the disciples after the departure of Jesus.
Later, however, he initiated a number of changes into early Christian teachings, in contradiction, for instance, to disciples like Barnabas, who believed in the Oneness of God and who had actually lived and met with Jesus.
Paul is considered by a number of Christian scholars to be the father of Christianity due to his additions of the following ideas:
that Jesus is the son of God,
the concept of Atonement,
the renunciation of the Law of the Torah.
Paul did these things in hopes of winning over the Gentiles (non-Jewish people). His letters are another of the primary sources of information on Jesus according to the Christian tradition.
The original followers of Prophet Jesus opposed these blatant misrepresentations of the message of Jesus. They struggled to reject the notion of the Divinity of Jesus for close to 200 years.
One person who was an original follower of Jesus was Barnabas. He was a Jew born in Cyrus and a successful preacher of the teachings of Jesus. Because of his closeness to Jesus, he was an important member of the small group of disciples in Jerusalem who had had gathered together following the disappearance of Jesus.
The question of Jesus's nature, origin and relationship with God was not raised amongst Barnabas and the small group of disciples. Jesus was considered a man miraculously endowed by God. Nothing in the words of Jesus or the events in his life led them to modify this view.
The Gospel of Barnabas was accepted as a Canonical Gospel in the Churches of Alexandria till 325 CE Iranaeus (130-200) wrote in support of pure monotheism and opposed Paul for injecting into Christianity doctrines of the pagan Roman religion and Platonic philosophy. He quoted extensively from the Gospel of Barnabas in support of his views. This indicates that the Gospel of Barnabas was in circulation in the first and second centuries of Christianity.
In 325 (CE), a council of Christian leaders met at Nicaea and made Paul's beliefs officially part of Christian doctrine. It also ordered that all original Gospels in Hebrew script which contradicted Paul's beliefs should be destroyed. An edict was issued that anyone in possession of these Gospels would be put to death.
The Gospel of Barnabas has miraculously survived though.