Or, if there is one, he surely doesn't give a damn about us.
Now, I've spent my whole life pondering the existence of God and ultimately I just have to come back to basic common sense:
1.) Too much suffering in the world: Every single day, for thousands of years, each and every one of your worst nightmares is experienced by at least one person, if not thousands, on this planet... EVERY DAY! Mutilations, disembowelments, rapings, dismemberments, betrayals, broken hearts, psychosis, etc.; it's all par for the course... EVERY DAY! That's a whole lot of suffering going on. Would an all loving God allow such daily horrors to continue just so he can conduct his test of our free will? If so, then this god is no better than Hitler, Stalin, or any other sadistic asshole.
2.) Not a SHRED of evidence: An omnipresent god would have to leave his mark somewhere, if not EVERYWHERE! Show me his footprint! Show me a miracle! Show me an event that violates the laws of physics! There is more evidence for the Easter Bunny than there is for an omni* god.
3.) Absent parent: It would seem to me, than any ALL LOVING god would stick around and nurture and help raise his children to become happy and peaceful beings and help us to learn from our mistakes. If there is a God, then he surely doesn't care to lift a FINGER to help. If there is a god, then he has utterly abandoned us; he doesn't not love us, and does not care and, thus, will probably destroy us when he gets around to it.
Don't shoot the messenger. Rather, cheer up! If you live around long enough and are lucky enough, you might live through The Singularity and get to become a god-like being yourself, which is what you all really want anyway...
Each of your arguments are based on assumptions.
1. Ethics/Morality: Any simple minded christian could argue out of this one.
Example counterarguements: Evil is not the product of God, but rather the product of man.
Counter Counter: The problem of Evil
Better Counter arguement: Man cannot conceive of Gods plan: What we see as evil is based upon worldly thinking, but is the best possible path for the good of all. God cannot be immoral as he is the very measure of morality.
CounterCounter: Morality is not an arbitrary creation, but rather an overarching concept. If Gods actions do not fall into the category of morality, he is immoral.
My view of what your saying is that it is rejectionist thinking. You were at one point Christian, and now your rebelling. Your second arguement is much better: No evidence. The first arguement deals with the characteristics of God. If someone says yeah, he is an asshole, then you still have done nothing to argue against his existence. Its like the Christian arguement that "we know god exists because he does miracles." Miracles are irrellevant; If Jesus brings me out to a lake and walks across the water, it only proves he can walk on water. It in no way shows that he is the son of God, or that god exists.
Raising Children? Very poor arguement. Look around you. Everyone around you is suffering. A God interested in making people happy and well adjusted would simply sterilize people. Bringing a child into the world causes its suffering. Its as simple as that. Why think God would be interested in your parenting ability, when the entire world functions on suffering? Plants are eaten by herbivores, herbivores by carnivores.
Even the second argurement is... well arguable. You perceive no evidence of God. Others perceive existence itself as evidence of God. Renee Descartes first philosphy really trumps the whole "no evidence" arguement. There is as much evidence of God as anything else: 0.
I overall agree with you. I am specifically playing the devils advocate because if this is a message you are going to bring to people you need to be able to trump their arguements. These are cookie cutter arguements and any philosophy 101 proffesor at a community college would rip them to shreds.