No, the righteousness of God is witnessed by the law and the prophets. God's way of salvation has always been by grace through faith. No, God's plan of salvation requires faith, not works. Redemption in Christ Jesus is the idea of buying out of the slave market of sin, our condition before salvation. The price of our redemption has been paid by the blood of Christ.
Propitiation means satisfied.
The righteous demands of a holy God were satisfied by His Son on the cross. God's plan of salvation covers sins committed before the cross. Show from Scripture that God's plan of salvation is for all people. It is excluded. No, but by the law of faith.