It has everything to do with the Gospel. A mere man could not die for the sins of the world. If Jesus is not God, then he is no different than Mohammud or Buddha. He is nothing more than a good teacher. You still have not dealt with Jesus' own admission that He is God.
I agree, a mere man could not atone for the sin of the world. But he was not a mere man.
So, incase you are wondering what I DO believe of Jesus I will say this.
I believe and proclaim that Jesus is the one and only true son of God, conceived of God's spirit, born of a virgin, inheriting the righteousness of God with all the attributes of perfection attributed to the Father, and without sin or blemish. I have no hesitation in saying He is my Lord & Saviour.
You have just defined Him as God, but reject Him as God. That is a strange way your mind works. Jesus could not have the perfect attributes attributed to the Father and not be God, because God says, there is no one like Him. So for Jesus to have God the Father's attributes would make him like God.
Furthermore, because you obvious don't know Hebrew, you don't understand what "Son of God" means. It does not mean that Jesus is the offspring of God. It is a title that denotes equality, in Hebrew. One has to some mighty fancy theological gymnastics to get around the Bible.
If Jesus is your Lord and Savior, howcome you don't believe Him when He says He is God?
Jesus caled him self "Son of man" , that kind of means is equal to us then, doesn't it?
Yes he was again 100% man and 100% GOD. Son of Man and Son of GOD, he was GOD incarnate, and a man (John 1:1; 1 Timothy 2:5) also called the hypostatic union for you theologians .