Man is not born to atheism. He is born to believe. That's why God gave us a spirit, so we could have a relationship with Him and know Him spiritually. He convicts of sin, through our God-given conscience. It is used both for conviction and spiritual fellowship. Man was born for fellowship with God and we can see that, in the Garden of Eden. Also from the verse where God "breathed life" into man, and made him a LIVING SOUL! Without Christ, there IS no life in us. It is those who want no responsibility for their lives, that turn to atheism, and they actually think they won't have to give an account of themselves to God, just because they shun that responsibility, but actually that doesn't stop the part where God said we shall all stand before Him and give an account of our lives. Every one of us. That's one date, we shall keep with God.
Jesus also said, "The fool says in his heart, there is no God." He uses that word not to condemn man nor make fun of him, as man has done to Him, but rather to point out that a person is foolish to neglect their own soul, by rejecting God's free Plan of Salvation to save all of us from the condemnation that sin placed on us. God's plans shall never change, regardless of disbelief. We need to prepare now, because our choice determines exactly where we shall spend eternity. What shall it profit a person, if they gain the whole world, all the money and fame and what have you, yet lose their own soul?? That's what God calls foolish. Eternity is a very long time to get it wrong and that's what Jesus wants to get across to us, and stamp/impress on our hearts, so that none of us miss heaven. It is the fool, that would laugh at God's free offer to save him/her from hell. That's what Jesus is trying to say.
God said, if we do absolutely nothing and leave our very souls to chance, there's no way we're going to enter Heaven with sin on our heels. We are ALL in the same spiritual boat. We need to repent and ask God to forgive us, so that we may have eternal life in heaven. There's not one thing that is hard about that, except the stubborn soul, who thinks they know better than God. The road to hell is paved with stubborn and/or prideful souls.