While believing in "a" god or gods can possibly be argued with a small degree of logic, it's extremely illogical to believe in the specific god Yahweh - the obviously humanly flawed selfish, jealous, greedy, hateful deity of the bible whose actions and orders fit the description of any religion's main villain, much too tiny and petty to explain the beauty and vastness of this universe.
Any "all-knowing, all-loving, all-powerful" god who has ordered even one human to kill another human, EVER, is a FALSE god (not to mention the hundreds of thousands of children and women yahweh has ordered exterminated, or taken as slaves... the Good god, everybody!)
EVEN just once!
Or any infinitely loving god who can allow the existence of a place like hell (without becoming so extremely disgusted with himself at even contemplating the idea that he just snaps it out of existence in the very next thought), just proves itself to be a creation based on the umrealistic needs and desires of humanity during those violent, war-torn ages.
These are traits of a false god created by humans. 100%!!
How can you get angry when you have the power to solve every problem in the entire universe?
Just the fact that an all-knowing, all-loving god admits to feelings of "Jealousy" or even "Anger" should be the biggest trigger to, "I'm being lied to!" To clue you in that this god was definitely created by the egos and agendas of men, specifically, unequivocally.
While we may never know what allowed the conditions for the massive expansion (or big bang), that is the only place left for a god to hide. Every other aspect originally attributed to every one of our gods has been explained by natural phenomena. There is no evidence of any supernatural influence on anything that happens in this universe from the big bang itself to now. Again, there's a small chance a god may have been needed perhaps the moment before the big bang, but it's very small, and where did It go, and why did It decide to stop interfering with the universe?
Logically a loving god would forgive a first transgression made by the first people who didn't even know what "evil" or "disobeying" even meant. The story of Adam and Eve is no better than school children arguing over how to play, "You didn't play like i wanted you to, i hate you forever! You're not allowed on the merry-go-round anymore!"
"Hate," as indicated by the stories in the bible itself, seems to be the only emotion god feels for us on a consistent basis. But that's what you get for programming us wrong and then blaming us for it. Why set up so many conditions intentionally stacked against us, most of which with no meaning or reason (targeting lust: the one thing that creates life), unless he intended to toy with us?
Why set up such a corrupt system that, if we fail to meet these conditions, so many of us helpless humans in his care, under "His Infinite Love and Protection," are to be burnt and tortured forever with no chance of escape or even help from him, EVER, because you might have forgotten to apologize for saying "god damn" once.
Yes, christians HAVE built a god this dim, and hateful.
The only way out of hell is by scrapping the entire idea of being a good person. Just claim belief in and ancient book that endorses genocide more than love. Claim belief in the idea that an ancient god of prejudice sent a part of himself down, to sacrifice himself to himself, just so he can figure out how and why to forgive us for that one first transgression (that he set up all along) about which he's still holding that childish, playground grudge, all in the hopes that we'll kiss his feet for eternity!
(God of Justice and Forgiveness, everybody!)
Yahweh is purely illogical, and cannot exist as he is described in the bible. Read it with the mind of a human who cares and loves his fellow people, and wouldn't want to discriminate against them for no reason. In that frame of mind, no one can deny that a full read of the bible is the best source for all the reasons NOT to believe in Yahweh, nor his "extention/hand puppet" Jesus.
Read it as if you never want learn how to justify genocide, homophobia, sexism, racism, murdering babies, marrying and raping the women of cities you take over, etc..
I highly suggest reading the bible all the way through: your god orders and encourages all of these above things.
And if he can think this way even ONCE it proves he is not loving (love doesn't create hell, nor does it pit man against man), not all-knowing (if understands every reason for everything happening, and can fix all problems with a thought, then it is impossible/cruelty to get angry since you already knew what was coming, since you PROGRAMMED it all, and so it had to be part of your plan in the first place), and NOT all-powerful (an omniscient god CAN fix its problems with instant thought changes, so why choose bloody physical messes that only make things worse and more confusing coming from a god?).
If you disagree with these teachings, then you disagree with the bible. And if you disagree with the bible, then why are you still calling yourself christian?
Why not stand against such obvious abuse-justification in the form of ancient, invisible, intangible fear?
I get so many responses saying, "Well you're just focusing on the negative parts of religion, the negative parts of god, the bible, our cult members," but ... that's the point. NOBODY is focusing on the negative aspects of religion and DEALING with them.
...well, a rare few, and we atheists love that there are good christians trying to change things ... but if you disagree with god's teachings, then why do you still support him - but, i'll get to that...
Ignoring the negative aspects of god is exactly the same as promoting Adolf Hitler as a great and moral man because he was a Vegetarian, and was responsible for probably the most solid German economy in history. Just ignore the negative holocaust stuff, that's just focusing on the negative.
"I can call myself a nazi and not be associated with racism and the holocaust, can't i?"
"I can ignore the endless harassment, and violent reaction to homosexuals as instructed by my bible, and still support the bible and not be associated with homophobia, can't i?
Witch burning? Slavery? Calling unbelievers fools? I don't believe in any of that, but i support those who do by giving credit to this ancient hateful book!
But I can still call myself christian without directly adding support to words of bigotry, CAN'T I?!?!?"
If YOU promote the bible to others as a Complete Package, then YOU must believe it as a Complete Package!! Not believing it completely while promoting it as 100% truth, is YOUR own hypocrisy.
I didn't choose to put you in your "Christian" box, YOU did. Own it!
YOU chose to stick with this bigot god, despite all his actions, so stop backtracking when we call you out on your religion's encouragement of abuse!
Or do the rational, empathetic thing and stand against it, and you won't have to worry about being associated with christian-specific bigotry!
It really IS that simple: Stop supporting the bible, you stop supporting biblical abuse.
Believing in some parts of the bible and not others, and still calling yourself a Christian is the exact same as saying you're a big fan of Star Wars Episode 1: The Phantom Menace, but that you'd only ever been shown the trailer. You've heard the bad reviews across the board, and are hesitant to see the whole movie because you know it'll just ruin the magic the trailer brought you.
You'd just rather have "faith" (the belief in the words of other men) that it's "good".
Believe in the idea of a god if you need to. But don't give support to slavery, homophobia, sexism, and racism by supporting the holy book of hate-crimes, the Bible.
Don't be a lazy fanboy or fangirl.
Read it thoroughly and realize what has us atheists so thoroughly disgusted by it.