I agree with "into" (eis) John makes that clear in his later epistle:The nuance here is that all are a part of what God has redeemed to Himself. Well not exactly all, but more than just those who believe. Jesus did not come to condemn the world but to save it.
The problem is with the translation. The word translated as ON is actually INTO (eis). So this has to do with translation into the kingdom realm. The context is the kingdom of God. Remember a little back in the chapter Jesus talked about being born from above and ENTERING into the kingdom? How? By believing INTO Christ.
So the context is...those whose faith gets them translated into the kingdom realm in Christ to walk in His life....will not be condemned....but those who do not have that kind of faith are already condemned.
Jesus is not making up religion based on beliefs. That is Luther.
1 Jn 5:11-12
And this is the record, that God hath given to us eternal life, and this life is in his Son.
Does all the world have the Son? This seems to imply that not all do.
He that hath the Son hath life; and he that hath not the Son of God hath not life.
