Why does God love his people?

For you are a people holy to the LORD your God. The LORD your God has chosen you to be a people for his treasured possession, out of all the peoples who are on the face of the earth. It was not because you were more in number than any other people that the LORD set his love on you and chose you, for you were the fewest of all peoples, but it is because the LORD loves you and is keeping the oath that he swore to your fathers, that the LORD has brought you out with a mighty hand and redeemed you from the house of slavery, from the hand of Pharaoh king of Egypt.

-Deuteronomy 7:6-8

In short, God loves his chosen ones…because he loves them. Let the mystery of his choosing confound us, yet bring us to an awe-filled praise.