There are two people groups on the earth who have a hard time believing that God loved the world. It is Jews and Calvinists. They think that God's love is limited to them. The Jews thought it because they were born of Abraham and the Calvinists because they suppose themselves to be a special class of elected humans. In John 3 Jesus is transcending both of these groups.He is saying in John 3 that there is no limit on his love and the proof is that he, God, came in the form of a man to pay the penalty for all sin by substituting himself as the object of the anger of God against our sin.
Jesus Christ would have saved the man who drove the spikes in his hands if he would have asked him to. He did save the thief on the other cross who asked him to.
[Jhn 17:8-9 ESV] 8 For I have given
them the words that you gave me, and
they have received them and have come to know in truth that I came from you; and
they have believed that you sent me. 9 I am praying for
them. I am not praying for the world but for
those whom you have given me, for
they are yours.
It should be obvious that the "them, they and those" in the above verses are a unique group/special class that Christ is praying for. Those not included in His prayers, are not in God's family.
I am not a Calvinist. He was an Anti-Semite. I am not.
[1Pe 2:9 ESV] 9 But you are a chosen race, a royal priesthood, a holy nation, a people for his own possession, that you may proclaim the excellencies of him who called you out of darkness into his marvelous light.
Thankfully I was among the called or if you prefer, the elect.