Here is another disproof, which you can deal with separately: Should we honor our fathers and mothers, as the Ten Commandments says, or should we hate our fathers and mothers, as Jesus clearly commands (Luke 14:26)? I am not mocking the words of Jesus, but he does say "hate." But obviously the answer is to respect our parents. Why is that? Because these are both subject to interpretation, and Jesus is clearly using hyperbole, whereas the Second Commandment is literal. Here's a Christian source to back me up:
http://www.equip.org/free/JAL014.htm
Proofthatgodexists, notice what this source says:
> How can we tell when a statement is hyperbolic? The test is easy: whenever a statement cannot be literally true in the way or to the degree to which the statement claims, it must be exaggerated.
WHO decides that it's hyperbolic? THE INDIVIDUAL DOES. There is nowhere in the Bible that says "by the way, this is hyperbole so don't actually hate your parents." There are other sources from the first century AD that use "hate" in a similarly hyperbolic sense, but the interpretation of that particular phrase, "hate his own father and mother," is ultimately up to the INDIVIDUAL.
So, here we have a case where Christianity fails us just as much as atheism does for the child abuse thing. But don't say "Christianity is still better because in every case except this one it gives moral guidance." I have disproven your statement for one case, so I have disproven it for every case. Do you see why this is? In this case, the individual has to make a decision. He decides that the Ten Commandments version is the literal truth and Jesus's words are the metaphor, because he is a rational person. How do we define "rational?" NOT in terms of the Bible! The Bible can't tell us which is rational because it uses both "honor" and "hate." Rationality, and morality, lies in the mind of the individual for this case.
Every line in the Bible is yours to interpret. How do you figure out which is right? Oh, you use common sense... and where does common sense come from? Oh, from God... and how do we know what God considers common sense in a sticky situation? Oh, we read the Bible...