A discussion that did not end too well

I was pondering this question: If Jesus is not God, how can he take away the sins of the world. That question was meant for a neighbour of mine who is a committed Jehovah's witness. They believe that Jesus is only a man and not God. As I asked him this question, he cited the example of Adam and Eve who were created perfect and so is Jesus, he claimed. As a father teaches the son, Jesus was also taught well by his father.  He showed me some verses from the bible and I also showed him some verses that I know. Each of us were determined that our own view was correct. As each of us were determined to try to convince each other, it left a sour note as we parted company. Actually, my initial thoughts were that I felt my neighbour is a good man and he deserves to know Jesus God. But the bible says in Jonah 2:9 that salvation comes from the Lord. Sometimes, we in our own mind decide for ourselves who deserves to know Jesus and we pick those who we are comfortable with to talk about Jesus God. That should not be the case.