Again, I am asking a very basic question,
What must an unbeliever believe about Jesus in order to be saved?
You have yet to give a clear answer, as I have given.
I've told you.
Jesus said that he is the
only Way to the Father, John 4:6. He said that he had come to give eternal life, John 3:16, John 6:29, John 6:40, John 10:10, John 17:3. He said that he had come to seek and save the lost, Luke 19:10, that he had come to give his life as a ransom for many, Mark 10:45, that his blood would be shed for the forgiveness of sins.
He claimed to be God, and the Jews knew it; that is why they had him crucified. He also said that he and the Father are one and that anyone who had seen him had seen the Father.
John commented that anyone who believes in Jesus is able to become a child of God.
So we can only come to God through Jesus.
We can only have eternal life through Jesus.
We can only be forgiven by God through Jesus.
If a person is told that Jesus is the only way to the Father, they need to decide whether or not to believe it. They also need to answer, for themselves, the question that Jesus asked his disciples "who do you say that I am?"
If a non Christian's answer to that is "you are a good man with some interesting teachings, or a unique philosophical world view", or "you are/were not God and what you said about giving your life for many, was not true"; they don't believe in Jesus.
I've said that believing in Jesus means believing in his claims and who he was.