To be clear, your post isn't actually an "atheist argument" at all. What it is, is a critique made against christianity specifically based upon scripture and tradition.
Second, it's about whether this character called "god" is actually moral or good. I would put it slightly different though. Put it this way....most normally moral people will help others in need. Let's take for example if we see someone being attacked. Usually people will spring into action and try to stop the fight, even if they don't know what started it or what's going on. Why do we do this? We know that the people can be harmed, but also that they could unintentionally harm someone else around them. We understand that what they are doing is harmful by experience and potentially life threatening, so we intervene to try to minimize the potential harm done by the fight by stopping it. We see a car accident, we stop to render aid. We see a house on fire, we run in to try and save the people inside. We have empathy as human beings and that empathy is what leads to this behavior. Most people will say as well that if we had the ability to stop a crime...let's say a rape, then we most certainly would. This is where moral accountability comes about, because we as humans do have laws in place for those that don't render aid, or watch a crime happen and do nothing to stop it. Yet, even though we judge those people as guilty for not stopping a crime and have punishments....christians are just fine with the concept of a god who watches a rape and does nothing to stop it. We are told that we as humans must be more moral and more accountable, than the god who is supposed to be the pinnacle of morality? Who supposedly is the law giver/maker...but doesn't follow it's own laws? We are told we must not only obey...but love, respect and worship the very same god who has the power to cure a cancer stricken child...or watches as a pedophile rapes a kid, or watches the torture of a human being...and sits arms crossed while saying "don't worry, I'll get you later when you die". We are also told that this same god, who invented a place of eternal torment, is just and good? Meanwhile the criteria for by which souls are judged is so screwed up?! To be clear the bible clearly states in 3 separate books that the only unforgiveable sin is denial of the holy spirit or denying god. So, while christians may take solace that the pedophile will go to hell...if the bible is right, they might actually end up in heaven. After all, in those 3 places, it says so long as they never denied god and begged forgiveness before they died, they will be forgiven. All sins WILL be forgiven. So that means also, horrifically that this supposed pinnacle of justice, good, morality, etc...cares more that you worship him, than he does for human suffering. So by the logic of the bible, for it's own words, you can be a horrible person your whole life, murdering, raping, stealing and so long as you never denied god and ask forgiveness in faith, you will go to heaven. Meanwhile a humble Hindu, who spent his whole life dedicated to helping the sick and needy, who alleviated the suffering of thousands....has his ticket already punched for hell, because he didn't believe in the right god. So the argument is a moral critique of the character of god and the fact that we as humans are more moral than the god we are supposed to praise and worship. That should cause any christian to pause and reflect on what they believe....but so often they don't, because faith is a comfort that comes with a price and that price is your base integrity.
