 When they crucified Jesus, they didn't crucify Him because of sins He committed. When they crucified Jesus, they crucified Him ultimately by God's sovereign will for the sins that you and I commit, so that when we place our faith in the cross, when we receive that gift of salvation by simply believing, we experience what is called the great exchange to where God looks at the cross and He sees your sin, so that when God looks at you, He sees His Son, perfect, holy, and righteous because of your faith.