How is Jesus God if Mary Made Him?

In a comment section, I saw quite a strange claim(See Below).

His/Her argument is that how could Jesus, if he is God, be created. This is a fair point, if it was true that is. Jesus prexisted Mary, meaning, Mary couldn't have made him. As John records in his Gospel, "57 Then said the Jews unto him, Thou art not yet fifty years old, and hast thou seen Abraham? 58 Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am," (John 8:57-58 KJV). As Jesus claims, he was alive before Abraham was. I know this will sound crazy, but Mary actually was born after Abraham, thus meaning Jesus existed before Mary.

So, if Jesus existed before Mary, how can this be if Mary gave birth to him? Well, to know that we have to look into the epistle of Paul, "And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory," (1 Timothy 3:16 KJV). God came down in human flesh, as Jesus.