The rules of religions are made by humans, they may claim to be 'inspired by god', but if god is absolute and objective, and smarter than us, and not prone to pitiful human emotional outbursts... then these laws cannot possibly be the work of god.
That being said, I honestly believe that if there is a God, he's going to be *AT LEAST* as smart as I am, be *AT LEAST* as capable of understanding logical reasoning, and *AT LEAST* as loving as I am (probably alot more on all counts, infinite and all that... that and I'm not really that loving XD ).
Therefore, by definition, if I can figure it out, God already has. If I can poke holes in religious argument, then God never held those views to begin with, if he did, he's even more flawed than I am, and therefore, why should I worship someone who is beneath me?
The bible, quaran, torah, etc, all depict this 'god' (note no capitals here; it's a term not the name in this case) as being emotionally insecure, cruel, arrogant, selfish, rude, bigoted, stupid, foolish, warlike, violent, sexually deviant, etc.
Why, then, would anyone actually want to be a deitist if this is all they have to look up to for their peers? If this were a human, they would be a flawed, weak, insensitive, sorry excuse for a man, who would never go anywheres in the world, except perhaps as a tin pot dictator, and not even a particularly good one at that. Why do people desire to cling to this human expression of God? Obviously they're just anthropomorphizing him, trying to apply human attributes to something which's supposedly far beyond human, and the only reason they do this is for cultural reasons, to support their own positions and desires. To excuse their wars, their hate, their flaws.
If God is, by definition, flawless, then the laws of god would be incomprehensible to humans, and they most assuredly would not match up even remotely with our own cultural beliefs and cultural morals. One can only assume that all religions are false, to gross extent.
This is a large reason of why I consider myself a 'practicing agnostic', despite that it's an oxymoron. I am religious, but I refuse to accept this pathetic excuse of a man as being "perfect and pure", and abuse the name of God in such a manner.
I figure there's a high probability that there's either some mechanical order to things, or a designing intelligence of sorts, it's hard to prove fully, but the evidence does lean towards suggesting such. That being said, however, I can't accept man's flawed belief of the nature of god(s).