Jesus Christ is God, note the big G in God.
God became a man so he could represent man in his weakest state called a sinner. God forgives man of his sins, by covering the sin with his own blood that's why Jesus Christ was hung on the cross. Jesus Christ is God . No other god, note small g could do this or even did this.
There is huge amounts of evidence that Jesus existed, The bible contains 66 books that describe him and these 66 books cover a period of +- 4000 years, not only the bible but the Romans also have a description of Jesus in their archives.
Islam started because of Jesus, originating in sects that distorted the truth, including the Catholic Church
and when he was born