It is impossible that Christianity is not God's revelation of truth to man. Simply impossible. The math proves it beyond question. It doesn't take faith to believe that one plus one equals two, and it doesn't take faith to identify the religion which has mathematical certainty in its corner.
God didn't have to give us mathematical proof of His existence, but He did it anyway. God didn't have to give us proof of Christianity, but He chose to do so. And God didn't have to give us proof of His love for us, but that is exactly what He did. The proof is irrefutable.