Are all atheists this ill-informed about religion?

[Esquilax]

Help me understand here.  Are you saying that because Christians don't 100% agree on even basic tenets of "core beliefs" then it negates its validity?  I don't want to assume thats what you mean, but I have seen that premise espoused here by others.  

Since when does unity necessitate uniformity?  Even in the sciences, there is a diversion on topics.  Politics, name a policy/belief that 100% of Democrats agree on.  I just don't think you can state that because there is not 100% uniformity it automatically negates validity.  Talk about the validity of the claim that's being made (how its defined), not negate because it has multiple definitions/interpretations.

The issue here is twofold: first, christians can't agree on the contents of their own religion, and they are all pointing to the same book as proof that they're right and the others are wrong. This raises a very real question of how we determine what is accurate, and the fact that every single one of the disagreements has both sides pointing to the same book as evidence for their mutually exclusive positions raises serious doubts about whether that book should be used to confirm any of those positions at all. If a source can be cited as justification for both sides of a binary question, its use as evidence is highly suspect.

Secondly, the whole premise of the christian religion is that its tenets are an inerrant, perfect, divinely inspired message from god. The sheer number of divergences undercuts this for obvious reasons.