Why are so many people confused as to the identity of Jesus? That is the question behind the constant argument about the trinity. Once anyone comes to know Jesus for who he is and what he teaches then it is fairly simple to not only understand the Bible.
Peter at 2 Peter 2:1-3 gives us a basic premise. That is false teachers introducing confusion into the Christian congregation. Note his inspired statement about what Paul wrote at 2 Peter 3:15, 16 in 21st century English.
"15 Furthermore, consider the patience of our Lord as salvation, just as our beloved brother Paul also wrote you according to the wisdom given him, 16 speaking about these things as he does in all his letters. However, some things in them are hard to understand, and these things the ignorant and unstable are twisting, as they do also the rest of the Scriptures, to their own destruction."
Peter here calls these false teachers ignorant. Then he points out they twist the 'rest of the Bible' as well.
Are there examples of who any of these ones are and what they falsely taught? Yes. First; who they are identified as'
1 John 2:18, 19 calls these "antichrists". Then he bluntly calls all who teach Jesus as not being the Christ (Messiah) as liars. These ones used to be Christian. But they abandoned the way for their own reasons.
Acts 20:30 points out prominent Christians, taking the lead in the Congregation, would leave the Christian teaching taking fellow believers with them. Examples are: 2 Tim 2:16, 17 "But reject empty speeches that violate what is holy, for they will lead to more and more ungodliness, 17 and their word will spread like gangrene. Hy·me·naeʹus and Phi·leʹtus are among them. 18 These men have deviated from the truth, saying that the resurrection has already occurred, and they are subverting the faith of some." ((Now you know where the idea of the resurrection to heaven immediately at death started.)) Another example is found at 3 John 10 A man named Diotrphes, prominent in the congregation fighting against the Apostle John and all who were to him.
Another warning is found at Jude 4 about those "slipping in' to take advantage of true Christians. Paul calls this type imposters and wicked who mislead the congregation. at 2 Tim 3:13.
Back to your original question...Just look at the gospel according to John. John took great pains to record his gospel in such a way as to make sure all who read it to really understand who his close friend Jesus actually is. Did you note exactly what John said to firmly identify Jesus? Here are his own words at John 20:30, 31? "30 To be sure, Jesus also performed many other signs before the disciples, which are not written down in this scroll. 31 But these have been written down so that you may believe that Jesus is the Christ, the Son of God, and because of believing, you may have life by means of his name."
Many on this forum like to use what John wrote at John 10:30 as proof positive of their trinity idea. But they fail to read what Jesus said leading up to the statement, "I and the Father are one." Look for yourself if you actually love Jesus as your savior to all of that recorded conversation. John10 starting at verse 31.
"31 Once again the Jews picked up stones to stone him. 32 Jesus replied to them: “I displayed to you many fine works from the Father. For which of those works are you stoning me?” 33 The Jews answered him: “We are stoning you, not for a fine work, but for blasphemy; for you, although being a man, make yourself a god.” 34 Jesus answered them: “Is it not written in your Law, ‘I said: “You are gods”’? 35 If he called ‘gods’ those against whom the word of God came—and yet the scripture cannot be nullified— 36 do you say to me whom the Father sanctified and sent into the world, ‘You blaspheme,’ because I said, ‘I am God’s Son’? 37 If I am not doing the works of my Father, do not believe me. 38 But if I am doing them, even though you do not believe me, believe the works, so that you may come to know and may continue knowing that the Father is in union with me and I am in union with the Father.” 39 So they tried again to seize him, but he escaped from their reach."
Did you note Jesus saying "I am God's son"? verse 36. Do you actually wonder why those who mislead people about Jesus ignore Jesus own words? Since they deliberately ignore Jesus, is it any wonder they ignore Almighty God as well? Look for yourself to the accounts of Jesus baptism. One I like is found at Mark 1:11 because it is easy to remember. God plainly says to Jesus "You are my son, the beloved. I have approved you,"
Further in John 4:23-26 Jesus words...", the hour is coming, and it is now, when the true worshippers will worship the Father with spirit and truth, for indeed, the Father is looking for ones like these to worship him. 24 God is a Spirit, and those worshipping him must worship with spirit and truth.” 25 The woman said to him: “I know that Mes·siʹah is coming, who is called Christ. Whenever that one comes, he will declare all things to us openly.” 26 Jesus said to her: “I am he, the one speaking to you."
So then, Jesus as the Messiah is accurate when he said at John 14:6 "I am the way...No one comes to the Father except by me."