Good question. My general answer is that the God of the Old Testament was a real jerk. More questions arise in this chapter:
<font color="#BB0000">14</font> “Behold, You have driven me this day from the face of the ground; and from Your face I will be hidden, and I will be a vagrant and a wanderer on the earth, and whoever finds me will kill me.”
Whoever finds him? Isn’t it just Mom and Pop left?*
<font color="#BB0000">15</font> So the LORD said to him, “Therefore whoever kills Cain, vengeance will be taken on him sevenfold.” And the LORD appointed a sign for Cain, so that no one finding him would slay him.
Again, who but Mom and Pop are left?*
<font color="#BB0000">16</font> Then Cain went out from the presence of the LORD, and settled in the land of Nod, east of Eden.
<font color="#BB0000">17</font> Cain had relations with his wife and she conceived, and gave birth to Enoch; and he built a city, and called the name of the city Enoch, after the name of his son.*
Who’s his wife? His long lost sister? Or did God just create more faulty humans?*