The rejection of Christ is the surest proof that the human race is condemned and that there is something in every man that is incurable by man (Sin and Unbelief). Every man's condemnation is this - God sent one Man into this world without sin, and you don't want Him. Your neglect of Christ Jesus shows something about your character and nature. A man who wants to quit his sins will appreciate a man who was Sinless. If you don't appreciate and love Jesus Christ, there's something that's basically wrong with your character. If you reject a Sinless Man who bled and died for you, there's something rotten and perverse about you.
The Bible and the Gospel upsets unsaved men, because it is holy. Human nature hates true holiness, but not worldly religion. If the world promotes something and glorifies it, you can believe that thing is right out of hell. If Jesus Christ didn't show up, every man would have an alibi for his sin. Every man could say, "I'm just as good as so and so." But Jesus Christ has come, and you can't say you're just as good as so and so. Because so and so is Jesus Christ, and you're not that good.
Atheists magnify the sins and inconsistency of professing Christians, but they'll never ridicule an unsaved worldling. Crafty, critical, fault-finding atheists are always finding the worst in Christians, so they can have an alibi to keep on loving their secret sins. The world gloats when a Christian gets in trouble. The atheist also attacks the Bible, because the Bible came from Jesus Christ Himself, the Word (John 1:1, 14). The hatred for Jesus Christ is disguised, but it's there behind all their attacks on the Bible. Hatred for Jesus Christ is an unconscious thing with most people, they take Christ's name in vain all through the week, and they don't even realize why they do it. Any man who tries to get you to disbelieve the Bible, that man hates Jesus Christ. Questioning the word of God is an indirect expression of hatred for Jesus Christ. Every atheist has Bibliphobia; he fears what the Bible says about his sins and future. Atheists are the greatest haters of Jesus Christ on earth, and they are the greatest lovers of sin.
The atheist refuses to let Jesus Christ rule over him, the atheist turns to his own way and winds up in the lake of fire where he belongs. The atheist wants to do what he wants to do, he doesn't want a Holy God running his life, the atheist wants to run his own life. This the real reason why every atheist goes to hell: They don't want Jesus Christ to run their lives. They know what's best for them more than Jesus Christ does. The sin-loving atheist says this deep down in his pitch black heart, "Nobody's going to tell me what to do, if I do what the Bible says to do, I'll have to quit this, and I can't do that, and I'll have to do this and do that. I know what's better for me than you do, I want my own way."