There is one true God who made one way.
We all need the atonement Christ made for us because we have all done wrong in Gods eyes and he is just and will punish sin. We have all broken Gods laws, Jesus paid our fine, without him we are left to face Gods justice ourselves.
This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came by Christ Jesus. God presented him as a sacrifice of atonement, through faith in his blood. He did this to demonstrate his justice, because in his forbearance he had left the sins committed beforehand unpunished- he did it to demonstrate his justice at the present time, so as to be just and the one who justifies those who have faith in Jesus. Romans 3:22-26