The common Christian god is impossible. God can't be all knowing, all powerful and good. For there to be evil in the world, God must be lacking at least one of those three traits.
Assuming the world is 6000 years old, god must be lacking the good. He purposely fills the world with lies that contradict his existence such as: 1) stars that are more than 6000 light year away, thus making their light having to be created in transit to Earth when he created the universe, 2) Dinosaur bones, 3) Large geological formation, 4) DNA which supports the theory of evolution. etc
Also, freewill and prayer can't exist in the same world. If prayer works, when a football team that prays to win, if god helps them to win he is limiting the freewill of the opposing team. The other team could win, but not if god influences the game in the favor of the first team.
Continuing along the path of freewill, a god who punishes you for using the freewill he gave you is illogical unless, like I earlier proposed, he isn't good. Purposely leaving scissors on the floor and than being surprised your 5 year old tried to cut their own hair is absurd.
Back to the fact that he isn't good, if he were the moral authority, it is illogical to think that his moral message would change at all. Yet, slavery which was once moral in god's eye is now immoral according to most religious people. Mormon's most common answer to it is that 'the world wasn't ready for it' such as when they started allowing blacks to hold positions in the church.
If this concept were true, the great flood would have never happened. The great flood was God forcing his morals on the world, even though "the world wasn't ready for it". In the same, why wouldn't god take action on creating equality between the races even if "the world wasn't ready for it"?
You can't have a moral authority that's always changing to, surprise, suit the morals of the world. Black people were suddenly allowed in the priesthood of the Mormon church because the rest of the United States had already gone through the Civil Rights and the crusty old white men in the hierarchy of the Mormon church were smart enough to know they had no choice but to stop waving around their racism.
"There is no doubt that the so-called Civil Rights movement as it exists today is used as a communist program for revolution in America." - Ezra Taft Benson, 1967 talking about Black Civil Rights.
Anyways, as the title implies, this is only part 1. I'm sure in the future I will have need and reason to return to this topic and I will.
Until another day.