What a surprise. Another person who thinks we are the only ones that have to prove anything.As per the OP, J.Jump, I believe the onus is on you to show that the passage, (John 3:1-11) is speaking of the millennial Kingdom.
Let's just look at one more example of why this is not an everlasting life context. The Son of man was the one being lifted up. And this lifting up was tied directly into the OT type of the serpent being lifted up.
Now who was the serpent lifted up for, saved or unsaved folk? The answer is for saved folks. Those were saved individuals. They ALL left Egypt saved. They ALL passed through the Red Sea saved. They were ALL wondering in the wilderness saved.
And saved folks can be bitten by serpents today just like there were then. And it is because the So of man has been lifted up that we can still today look upon Him and live. If we don't look upon Him today we will perish just like they did if they didn't look at the snake. But nowhere in the OT type or the NT anti-type is this dealing with people that are destined to the lake of fire forever and ever and ever.
That's just a little added tidbit to what has already been given that shows this passage is not talking about everlasting life.