KEEP IN MIND: this is in no way an attack on religion and or religious people, meerly my reasons for not being a believer.
Problem number one: Why is believing in god so important to god? Regardless of a persons race, gender, and whatnot what life, in my eyes, boils down to is as follows: Are you a good person or a bad person...Whereas to the religiously faithful, it boils down to: Do you or do you not believe in god. Regardless of good or bad, believing in god and a possibly not-so-sincere apology is the ticket to heaven, regardless of how sadistic or bad someone may be. Why subjegate every single person on the planet to a test that sadistic idiots with the predisposition to faith pass with ease, and good-hearted skeptics have "failed" every single time.
Problem number deux: Manifestation...Tran/or con/ substantiation is such an issue, wether or not the wine is the blood and the bread is the body...if god wanted to quell that quarell that's divided the protestants and catholics and created so much hate...he need only manifest. Why would a god allow hatred over a very fixable issue.
Problem number three: Manifestation part two. WHY DOSN'T A GOD MANIFEST. Nothing else to say here, really. I would instantly be a believer if a god is able to manifest himself to the world. Most will say this is a test of faith, wich I cover in part four.
Problem number four: The test of faith. The religious extremests will say that all life is is a test, and as pointed out in part one, that test is one-sided to begin with. But wait, if I am subjected to the christians test, and the catholics, and the muslims, and the million other religions...why is me being an atheist so bad? A christian denies the gods of the literally THOUSANDS of other religions in the world, so me denying the existance of theirs is now heracy?
Problem numero cinco: HATE. Would a god as brilliant as to create our cosmos really allow bloodshed in his name? “Is God willing to prevent evil, but not able? Then he is not omnipotent. Is he able, but not willing? Then he is malevolent. Is he both able and willing? Then whence cometh evil? Is he neither able nor willing? Then why call him God?” - Epicurus
Problem number six: The age of the earth/evolution. I don't deny that I am a skeptic, I don't believe 100% in anything I cannot see, but what I CAN see is that the earth is a heck-of-a-lot more than 2 thousand something years old. And it sure as hell has evidence of evolution.
That's all for now...rant/hate/what have you.
Edit numero uno. Problem seven: Hell... Why does a hell exist? A god who created us in his image says it's wrong to torture our fellow man, and yet has a lake of fire and his own torture chamber to burn and kill and mame and did I mention torture the people who disagree with him. And if you want to believe mormonism, then satan himself was the son of elohene and the brother to jesus himself. Why is satan evil? And jesus good? They both had equal opportunity to get heaven, and yet due to the flip of a coin one must live in infamy while the other gets eternal praise and glory? No way, not buying it.