The tendency for centuries has been to read Scriptures through modern trinitarian spectacles. Why bring this up?
Well, most people see Christ being emphasized throughout the New Testament, including those Scriptures which show his followers were to be his Witnesses. There is no denying that. Jehovah's Witnesses should be made aware of this.
On the other hand, the Christian Scriptures are a continuation of the Hebrew Scriptures, not a replacement of it.
The Old Testament extolled the name of "Jehovah" over all others, and this was fitting under the Jewish concept. Nonetheless, the OT mentioned prophecies that in due time there would be a ‘Sent One’ from God to bring prosperity to all of earth's inhabitants, such as this one in Ge. 22:18. "And by means of your offspring all nations of the earth
will obtain a blessing for themselves because you have listened to my voice.’” Hundreds of such prophecies made their way into Scriptures foretelling of the time where ‘the Savior of the world’ would show up. After nearly two thousand years after God's promise to Abraham, the Messiah thus appeared. The Jewish people were monotheists, and were accustomed for centuries to the practice of worshiping the one God of the universe, YHWH.
Would it be easy for them to now incorporate Jesus the Messiah in their lives? Not really. The Jews had difficulty dropping the old customs of worship in a physical temple, circumcision, Jewish feasts, the Sabbath, and many other Jewish practices. The book of Romans, Galatians. Ephesians, Hebrews, etc. give testimony to this fact.
Hence, it was necessary to repeat time and again how important was Christ now in their lives. Salvation depended upon such acceptance. No easy task for traditional Jews. Jesus thus said: "I am the way and the truth and the life. No one comes to the Father except through me."
Since the Trinity became established in people's mind, traditional believers ignore the Father, and focus almost entirely on the Son. The many differences found in hundreds of manuscripts reveal the struggle people of that time had between the old Jewish belief of the Father as God, and the philosophical trinitarian belief (usually with Jesus at the top in relevance) of later times.
Thus, it was expected that Christ would receive the spotlight for God's followers. John 3.16 shows that belief in Christ is essential for a Christian. The thing is that the Father was never far away when Christ was to be honored. This is so because the Son was sent as God's representative. The Son was never to replace the Father altogether. The God and Jesus worship pattern was now the new norm. The Jews were already ‘Jehovah's witnesses’ in a sense (not in the WT sense), but now they needed to be ‘Jesus' witnesses’ (but not in the trinitarian sense). To reject Jesus is to reject his Father who sent him.
John chapter eight shows that Jesus was fully dependent on the Father. A Christian has to accept and honor both the Father and his Son, Jesus Christ, equally within the new Christian concept. The Trinity didn't help the people at all, it made matters worse by pushing Greek concepts within the Christian's mold of thinking.