It's the beauty of his love. The word for it is "agape". It is a perfect and holy love that we as humans can never achieve, but it's how God sees us.
"For God so LOVED (agape) the world..." (John 3:16)
As humans, we could never take God's place because we are sinful and, I don't know about you, but I know I would have just struck down the people of Israel after the second or third time they screwed up and gone "Well let's try again." and started over. The fact that He didn't do that and still continues to love and watch over us baffles my mind, but makes me all the more thankful for His love, though I know I will never be worthy of it or be able to return it as completely as He gives it.