You know the Adam and Eve story right? That made us sinful ( in the Christians view). We believe that Jesus’s death and resurrection freed our souls from that sin.

For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death. For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh: That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit. (Romans 8:2-4)

This is also one of main points that differentiates us from Judaism’s religious views, but that is not really important to the question. Think about a parent with two kids. He loves both of them, but he will reward the one who is most obedient, and yet spend most of time trying to sway the disobedient one, because no matter how much they disobey or don’t acknowledge him, he is still their father (Luke 15: 11-31).

Besides, Christ came for us all because we all are impure

You see, at just the right time, when we were still powerless, Christ died for the ungodly. (Romans 5:6)

The grace of our Lord was poured out on me abundantly, along with the faith and love that are in Christ Jesus. Here is a trustworthy saying that deserves full acceptance: Christ Jesus came into the world to save sinners—of whom I am the worst. But for that very reason I was shown mercy so that in me, the worst of sinners, Christ Jesus might display his unlimited patience as an example for those who would believe on him and receive eternal life. (I Timothy 1:14-16)

Gods views us all as his children and he loves us all. But in fact God cares greatly about saving non Christians. We are all born in sinful flesh, but christians strive to be reborn through Christ Jesus in the spirit. Jesus came here to save what was lost to sin…all of us (Luke 19:10)


P.S. Sorry about assuming you are a atheist and I apologize if this post is redundant or unclear.