God killing himself on the cross for our sins just doesn’t make any sense . You get judged and rewarded according to your own god deeds and bad deeds makes complete sense .
God did not die on a cross. Christians do not believe this. While we agree the justice demands a person pays for their own sins, the problem is that God has decreed death the penalty for sin. The first sin committed by Adam resulted in death. God had warned Adam that this would happen. Obviously this is not the same in Islam, but according to the Bible, the "Wages of sin is death..." Romans 6:23 but "the gift of God is eternal life through Jesus Christ our Lord." How can this be? Sins death is what we earn by sin, and the only way for sins to be paid for is in blood (that is why the Jews sacrificed animals on Passover) God's justice demands payment for sin. Since no man could pay for their own sin except through death, God send his Son to die for the sins of mankind, because he loves us. The death of Jesus Christ is the substitute for our sins. This is the gospel, Jesus Christ dies for your sins, so that you can be forgiven, and be in right standing with God.
I think that you need to educate your self dude. Christ the Son of Mary was just but a man and a messenger sent to the people of Israel. He himself did not claim divinity and his miraculous acts were not any more different than for lets say Prophet Moses splitting the sea or Prophet Solomon who was given the permission to Control Demons. Moreover, the death of a man cannot atone for the sins of whole humanity. This logically does not make sense and makes me conclude that this belief has pagan origins.
The death of a simple man cannot pay for the sins of all humanity, but a sinless, holy, man could. The sinless, holy man, Jesus Christ paid for your sin. You need to accept this, that Jesus died for you, so that you can have eternal life. Trust in Christ today.