So, again, is rejecting Christ a sin?
I am glad to here that i am providing you with entertainment. However, without direct involvement from the Holy Spirit, is it possible not to reject Christ? 1 Corinthians 12:3 says the answer is no.
Therefore I want you to know that no one who is speaking by the Spirit of God says, “Jesus be cursed,” and
no one can say, “Jesus is Lord,” except by the Holy Spirit.
1 Corinthians 12:3 NIV
So if we say that rejecting Christ is a sin, we can only conclude that it is a sin that we are forced to commit unless the Holy Spirit is involved. So essencially, unbelief is a sin that God is forcing us to commit due to His uninvolvement. James 1:13 says that this is not possible.
When tempted, no one should say, “God is tempting me.” For God cannot be tempted by evil, nor does he tempt anyone;
James 1:13 NIV
I can only conclude that unbelief, is not a sin. The blood of Jesus atoned for all sin. Thus, if we must stand before God on the Great White Throne of Judgement, we will not be judged for our sin, we will be judged on our decision to accept Jesus' free gift of salvation. Hence, God will send people to hell because they freely chose to go there. They rejected God on earth, so to honor their decision, they will spend eternity separated from God in hell. Hence "God loves you too much to force you to spend eternity with Him".
But how is it possible that God wills that none should parish and all would come to repentance (2 Peter 3:9) and yet we can only believe if the Holy Spirit is involved (1 Cor 12:3)? I conclude that the Holy Spirit is at work and involved for everyone. For some (the elect) that involvement guarantees saving faith.
For the non-elect, the possibility to come to a saving faith is there too. The door is open for them and the Holy Spirit is beckoning them to walk through. However, if they choose not to walk through that door, they will spend eternity in hell for that choice. Not because the choice is a sin (that would be the true "Limited atonement" because the blood of Jesus couldn't atone for the "sin" of unbelief, something I fiercely reject), but because God allows it.
C.S. Lewis states, “Merely to over-ride a human will…would be for Him useless. He cannot ravish. He can only woo” (Lewis 1976, 12).