‘He who puts his faith in the Son has hold of eternal life, but he who disobeys the Son shall not see that life; God’s wrath rests upon him.’ John 3:36. New English Bible.
If we offer our love to someone and then tell them that failure to accept our love will result in our wrath, we are not offering love. We are threatening the person. This is a bullying - love me or else attitude and is an abuse of the word love.
The Jehovah’s Witnesses Bible uses the words, ‘God’s wrath remains upon him.’ Suggesting that it is already there and can only be removed by accepting the love under pain of death.
These are the writings of John which have been claimed as God’s words. Perfect love should not be conditional. If a perfect God exists, John has failed to explain such a God.