Questioning morality

What I was taught about this sort of dilemna is that God can not let anyone in his presence (heaven) who is with sin. The only way to rid yourself of this sin is through asking for forgiveness, through Jesus as an intermediary. It doesn't matter what the sin is, "for all have fallen short of the glory of God", only that you ask for forgiveness.Even though I no longer believe, this type of morality seems to be better than the vengance that seems part of human nature. Turn the other cheek, whoever has not sinned cast the first stone, and do unto others seems to speak to this higher morality that everyone should strive towards beyond any particular belief system. Oops, starting to preach again.

Taking the bible literally, they should be the direct descendants of Adam and Eve, as well as Noah. You would think that Pre-Flood oral histories and a belief in the Christian god would still be intact.This problem is something I have also mulled over many times. If the christian god is obviously the true god, according to many christians, why don't all cultures believe in him. Better yet, why only choose the Jews as the chosen people, at least in the Old Testament and the Old Covenant? It kind of complicates Pascal's Wager a bit.