You added to scripture. That's not in John 3:16.
Jesus was prophesied to and for the Hebrews (Deut. 18:15, 18.)
He came to and for the Hebrews (Jn. 1:31.)
The animal sacrifices were to atone for the sins of the Hebrews (yearly.)
Christ as Lamb of God was sent to die for the sins of the Hebrews and in keeping with the Mosaic Covenant.
Jesus came and taught the Hebrews from out of the Law.
Jesus Himself said He was sent to the lost sheep of the House of Israel.
Jesus sent His disciples to the lost sheep of the House of Israel.
All three covenants are between God and the Hebrew people.
God spent about three thousand years from Abraham to Christ dealing exclusively with one people, defending this one people, feeding this one people, protecting this one people, raising this one people, prospering this one people, chastising this one people. He gave this one people His Law and the benefits of the covenants. This one people prayed to their covenant God, worshiped their covenant God, served their covenant God.
Christ fulfilled the Law and everything it described, and He did it in accordance with covenant and prophecy.
God says this one people is holy, a kingdom of priests, that He loves this one people ABOVE all peoples of the earth.
And after spending nearly three thousand years intimately involved with this one people, delivered this one people many times, betrothed to marry this one people, gives this one people the Gentiles to inherit as a love-gift from Husband God, places His Holy Law in the inward parts of this one people, gives this one people His Holy Spirit, and all of a sudden His first words after resurrection and through His apostles is to speak His first Word to Gentiles?
When I said "world of Jews" I am pointing to the fact that in all that Jesus did He did to and for the Hebrews. The word "world" is used in context and in historical context it refers to the Hebrew. But you take this Greek word to include EVERYBODY and that's not what John is saying. If the animal sacrifice was killed to atone for the sins of the Hebrews according to the Scripture, God is not going to all of a sudden change His word so that "world" includes Gentiles after thousands and thousands of centuries of dealing with one people: The Hebrews.
What the Hebrews have in the God of Abraham the fact remains that Gentiles have nothing because they are nothing and vanity and Christ did not die for unclean, uncircumcised, idol-worshiping Gentiles. He died according to the Scripture TO and FOR those He came to save, and that one people are the Hebrews.
There is no covenant between God and Gentiles in all of the bible. Gentiles do not and have not enjoyed such an intimate relationship with God as the Hebrews have for centuries on end.
But what Gentiles have done is stolen everything God gave or promised to His covenant people and made it all apply to them. Terms like "covenant" and "Church/Great Congregation" and "Bride" and "Betrothed" and "saint(s), which all belong to the Hebrews as Scripture records these belong to them, Gentiles have stolen and made everything that belonged to the Hebrews to belong and apply to them (Gentiles.)
It's called Inheritance theft.
Someone draws up a last will and testament, names a beneficiary or beneficiaries, and a stranger comes in and steals the Hebrews' inheritance.
Is that legal?
Is that moral?
Is that of God?
No, it's not.