All people on the face of the earth who have not received Jesus Christ as their Lord and Savior are guilty of the only sin that Jesus could NOT die for at the cross: Unbelief in Jesus. However contrary to popular belief, God is NOT angry with unbelievers for not accepting Him. At the cross 2000 years ago the sins of the whole world were forgiven.
Tit 2:11 For the grace of God that brings salvation has appeared to all men. (NKJV, emphasis added)
BUT we have to put our faith in this grace to receive it. God has already reconciled the entire world to Himself through Jesus, He has made provision for every single person on the planet to be saved:
2 Cor 5:19 that is, that God was in Christ reconciling the world to Himself, not imputing their trespasses to them, and has committed to us the word of reconciliation. (NKJV, emphasis added)
God has already punished the sins of everybody on Jesus, but people have to believe in Jesus to receive this forgiveness. Unbelief in Jesus is the only sin that Jesus could NOT die for, and therefore all who commit this sin cannot be forgiven.
Now God is not in the punishing business anymore, because He has already punished our sins in the body of Jesus. In these days, God is extending His goodness towards everybody on the planet (believers and unbelievers alike) because He wants them to see that He is good and that He loves them. It is the GOODNESS of God that leads people to repentance, not a fear of punishment.
Rom 2:4 Or do you despise the riches of His goodness, forbearance, and longsuffering, not knowing that the goodness of God leads you to repentance? (NKJV)
That is why atheists and sinners are not our enemies, but our friends, because if God loves them then how can we not? Our job is to show them the love of God, not judge them. However by their continued unbelief they willingly reject this offer of peace from God, and in the process trample the blood of Jesus underneath their feet, and their hearts all the while becoming more and more hardened.
Rom 2:5 But in accordance with your hardness and your impenitent heart you are treasuring up for yourself wrath in the day of wrath and revelation of the righteous judgment of God. (NKJV)
On that 1 single day of judgment (not years and years as some say, see Rom 2:5 above again) these unbelievers will be judged for NOT believing in Jesus.
1 Tim 2:3 For this is good and acceptable in the sight of God our Savior, 5 who desires all men to be saved and to come to the knowledge of the truth. (NKJV)
Therefore since God loves unbelievers and wants all people to be saved, it is our mandate to extend this same love to our unbelieving neighbors, since we are God’s hands and feet in the earth. Most unbelievers have hearts that have grown very hard, not necessarily against God, but mostly against Christians who have misrepresented God as being a harsh God who allows sickness, violence, injustice & punishment to reign on the earth. And then on top of this, if an unbeliever wants to join the church, they now have to start obeying all types of laws as well and they had better make sure they change their lifestyle, else they will be kicked out by the church or God will punish them. Come on! What kind of logical thinking person would want to sign up for that?
Let’s show them the kind of love that God showed us when we first came into Christ.
Rom 5:8 But God demonstrates His own love toward us, in that while we were still sinners, Christ died for us. (NKJV)
None of us deserved it in the first place, why then should we try to make others feel that they have to measure up to some perfect standard?