One problem many atheists have is that they satirise God so much, and think about Him in such little depth, they start thinking of Him as their satirical versions of Him. Is God really just an old man on a cloud who happens to fart lightning? This may well be the blasphemous image you see in cartoons, like Family Guy or The Simpsons, but obviously, God is far more than that.
In truth, God is not even a man (save, of course, for the Incarnation, but we're getting ahead of ourselves there). Rather, He is Spirit, and in fact is the source of all things that are not Himself. If a thing is not God, it came from God. Furthermore, He has the power, wisdom, and authority, to create, sustain, and govern this world in any way He sees fit, even if some of the things He creates object to this.
And of course, they often do. In fact, as human beings, all of us have gone astray. It's called "sin". We have seen the will of God, in conflict with our own, and followed our own will. When He says "thou shalt not", we do, and when He says "thou shalt", we do not. This, by nature, stores up the wrath of God against us.
But one of God's great attributes is His love, and so although wrath is justified, it is not His desire. Scripture tells us God takes no pleasure in the death of the wicked, preferring their repentance, and thus their life. The trouble is, to the wicked, repentance is repugnant. Rather than confessing that we have done wrong, and turning away from it, we accuse God of being in the wrong for the commands He gives, and especially for punishing us for breaking them.
Where exactly we think we get this authority is beyond me, even as a sinner myself. I cannot understand what makes us think this way, and I certainly cannot imagine living in such a delusion. God gets His authority over His creation from the simple fact He made it, owns it, and knows how best to run it. Authority is His to wield, and even to delegate, as He sees fit. But where does an atheist get the authority he thinks he has when he claims God is immoral? Just because he can claim it?
This is quite clearly illogical, yet, somehow, many atheists claim that if it turns out they were wrong, and God does exist, they will rebuke Him to His face. Just like Abraham apparently should have when God asked him to sacrifice Isaac. "Tell it to bog off", as one atheist I debated said.
This, however, is delusion upon delusion. Reason alone should tell you the flaw in this plan, yet somehow, atheists think they would be able to talk back to God? This is entirely due to the fact they've simply never met Him. Even those who have, throughout history, have only seen Him in part. Nevertheless, their responses are always a sudden realisation of just how insignificant they are in the grand scheme of things. Take Job's reaction to seeing God as a whirlwind, for example: "“I have heard of You by the hearing of the ear, But now my eye sees You. Therefore I abhor myself, And repent in dust and ashes.”" (Job 42:5-6).
This is what God does to sinners just by showing up. When we see Him, we quickly lose all delusions. It's like the old martial arts saying: "Everyone has a plan until they get punched in the face". Well, every atheist thinks he has a plan for "if" he is wrong. But there is no if, and there is no way his plan will succeed.
There is, however, one way to survive the final judgement: Penal Substitutionary Atonement. The sin we commit stores up wrath, but who that wrath affects is open ended. The first option is to just execute it against the sinner to whom it is owed. But a better option is for God Himself to absorb it. And so He did. 2,000 years ago, Jesus, the Son of God, became incarnate in human flesh. He lived a perfect life, devoid of sin, yet He received a sinner's death, taking the full wrath of God upon Himself. This gives us another option. By confessing Him as Lord, and believing in our hearts God raised Him from the dead, we effectively "swap verdicts". The sin we committed is considered His, and the righteousness He lived is considered ours. This is the only successful argument any man will ever be able to make against God on judgement day.