Covenant Love

Why does Saul hate David in his heart? What was the motive of Saul in taking David home to his house? Is the Gospel exclusive and narrow? How is God working through the relationship of David and Jonathan? How do some pervert the Scripture to give credence to homosexuality using the Spiritual love of David and Jonathan? Why is a relationship between a man and a woman the only physical relationship ordained by the LORD? Is everything outside of Christ unrighteousness? Is anyone worse than the other? What is a covenant and how is the basis of it love?