Just as we cannot scientifically prove the existence of a creator, we cannot prove the non-existence of one. (I am not trying to make a big announcement here, just establishing the basis for my thinking.) That leaves me with one alternative, agnosticism. But, unless you count events described in the Bible, I know of no occurrences in which a supposedly loving creator stepped in to prevent catastrophes, natural or man initiated (i.e., the Holocaust), from occurring. Therefore, although I am willing to stipulate the existence of a very wise and good Jewish rabbi named Jesus 2000 years ago, I no longer acknowledge that he was divine, even if He and his disciples thought he was. And there you have my core reasoning in regard to Christianity. So, I try to behave like I think a GOOD Christian ought, but I anticipate no reward, other than love and friendship of the people around me. (And that doesn't always hold true, either.)