I know I'm just jumping in here, but couldn't it be said "Your world view starts with an assumption or presupposition that the Bible is not true"?
I mean that's a pretty bold statement telling someone how their worldview starts.
I am a born again, spiritually resurrected and reconciled to our Creator through the blood of the man Christ Jesus, strait up. But my worldview did not come the way you're suggesting. I didn't start with "the Bible is true", at all. In fact it wasn't until after He saved me that I even went to the bible at all.
I agree with you the most logical position to take is one of neutrality, the only thing is I also think neutrality is an impossibility in real day to day life, because our worldview shapes every decision we make every day. I mean why do you behave the way you behave, it all has to do with our worldview. Now that said I know from personal experience that we don't ever think of it this way, but that doesn't stop it from being true. Without God there is no solid reason to do "right", because no matter what reason you create for yourself, or how many people you get to agree with you, it's nothing more than arbitrary thought in the mind of an insignificant speck of accidentally evolved bacteria with no purpose other than to "be". No matter what you tell yourself, or how you try to dress it up, without God nothing ultimately matters, and there is no way to escape these cold hard facts. If you honestly think about it.
This said it always seems to come up that this is suggesting that atheist can't be or do good things. This is false. Any of us can do good and bad, and there are amazingly great atheist out here that do great things, in the worlds eyes, but I'm talking about the ultimate "WHY", why do we do these things? If there is no God, no "mind" before man that creates and defines these things above men, then all you are left with logically is the opinion of man. This is why I think neutrality is a logical impossibility. No one is neutral, and to claim so is just a an excuse for people to be able to stick the screws to the Christian, or anyone else with a solid worldview they stand on, while they get to sit back and claim nothing, they only criticize and have nothing of any substance to put forth themselves. A cowardly stance in my opinion. We all had a worldview, it's just when we take a good honest look at them the weakest is atheism, no one boldly defends atheism as a worldview, they only mock others. Like I said weak, but my point here is that it is impossible not to have a worldview, you see the world a certain way, even though you haven't declared to "believe" anything fully yet, doesn't mean you don't see the world a certain way.
So while I understand what you mean, and even intellectually appreciate your view, I just think it's practically impossible. I can't wait to get your thoughts.