That is the other important aspect of the Jesus story. He was the son of God in human flesh, exemplified by the manner in which he lived ("good guy") and by his teachings.
Yet he was betrayed by one of his disciples, and died a distinctly "low death". I think it's more correct to say that God sent Jesus down to Earth and Jesus sacrificed himself / God forsake him, than "he is sacrificed by God". This is probably a bit nitpicky from your perspective.
My main point is that there is no Christians that do not hold the following two aspects of Jesus as extremely important:
(1) The life of Jesus: how he lived and what he taught
(2) Jesus sacrificed on the cross
Frankly, I think you're not familiar with Christian teachings if you claim otherwise, i.e. by disagreeing with a person who says that Jesus being a "good guy" is an important aspect of the Christian faith. It is important, unequivocally.