As a former believer one of the things that I found disturbing was the teaching of our creation and propagation as a species as it is narrated in the Old Testament. I found it odd that God allegedly created all the animals and their species separately but in some unknown number or populations so that they too could propagate and spread. I think that the creation story would have been much more believable if it just said God created whole populations of people and spread them out all over the earth. Instead, he makes one pair and tells them to be fruitful and multiply. So basically what the Bible teaches is that humans are the product of many incestous relationships! I find that to be offensive and embarrassing that a loving creator would choose this method for the propagation of the human race.
Let's think about this for a minute if the Garden story is true (which it obviously isn't) then Adam had to have intercourse with his wife who later gives him two boys Cain and Abel. You later find out that after murdering his brother Cain is separated from his family and condemned by God to be a "restless wanderer."
10The Lord said, “What have you done? Listen! Your brother’s blood cries out to me from the ground.
11Now you are under a curse and driven from the ground, which opened its mouth to receive your brother’s blood from your hand.
12When you work the ground, it will no longer yield its crops for you. You will be a restless wanderer on the earth.” Genesis 4:10-12
made love to his wife, and she became pregnant and gave birth to Enoch.
Cain was then building a city, and he named it after his son Enoch.
Notice that here is where this story gets a little less credible. God curses Cain and claims he is going to be a restless wanderer but then we find out in verse 17 that he actually has a wife and builds a city! That's one of those questions most ministers have to dance around to answer one of the most popular questions atheists and even some believers like to ask. Where did Cain find a wife when according to the tale the only people that existed were his parents and his brother who he had murdered? He actually lived in the land of Nod (wandering) and built a city. Not bad for a man who has been cursed and condemned by God.
Considering the high risk of birth defects due to incestuous relationships I don't believe that an all knowing all wise deity would choose this method for populating the earth. The limitations in the human gene pool would make for a very boring and sick species. It's obviously a myth a badly written one at that. I find the idea of our so called beginning being incest repulsive and offensive in every way. Although from a naturalistic point of view minus gods it actually would make more sense as a means of our early beginnings.
Note: All biblical citations are taken from the New International Version of the scriptures.