Well, this thread certainly doesn't dance around the subject of religion. When this is over, I'm sure we'll all be able to say "Well, that's that. God [does/does not] exist. Time to hit the hay."
Anyway...
Point 1:
Here is what I find illogical about the Christian (Omnipotent, Omniscient, Omnibenevolent) God. Why is there so much unecessary suffering in the world?
Proof:
There has been at least one instance of pointless suffering in the history of humanity.
If there were a God, He would not have allowed any completely pointless instances of suffering.
Therefore, God does not exist.
An example is Rowe's Fawn:
Suppose in some distant forest lightning strikes a dead tree, resulting in a forest fire. In the fire, the fawn is trapped, horribly burned, and lies in terrible agony for several days before death relieves its suffering. No greater good would have been lost had the fawn's suffering been prevented. Thus, one one may conclude that such suffering was pointless.
Other examples include natural disasters striking densely populated areas.
Point 2:
I think what scratch is getting at is this:
If God wants what is best for us, and Heaven is what is best for us, why didn't he just give us the natural desires to be good or stop Satan from being evil or such.
Point 3:
But God does care. He doesn't want to send us to Hell, he wants everyone to go to Heaven. Hell is merely punishment for not living a life devoted to Him and His word. Heaven is the reward. We are His children, and parents must punish their children when they disobey. That doesn't mean they don't love them.
a. Why is it eternal punishment for a temporal sin? Even if it was an entire lifetime of sin, it still wouldn't match up to an eternity of punishment. To that seems unecessarily cruel.
b. The point of punishment is stop further transgressions. Punishing someone for all eternity is counter-intuitive. They never get the chance to learn a lesson and not be bad again. That would be like a parent killing a child for not going to bed on time.
If I missed anyone's argument, please tell me. I'm in the debating mood.