tec:
Sarah gave her maidservant Hagar to be Abraham's wife, to build a family.
Seriously? That's your justification for Abraham using Hagar as a sex slave? Because she was Sarah's property? Such is the dispicable 'morality' of the Bible.
That rivalry can be seen in their sons... Ishmael to Isaac at first... and that is why they were permitted to be sent away.
That's right. If siblings (or step-siblings) don't get along, the parents don't help them get along, they send the child and its mother into the wilderness. Do you understand that this is freaking insane??