Read Romans 11:1-2a, 29-32
I ask, then: did God reject his own people? Certainly not! I myself am an Israelite, a descendant of Abraham, a member of the tribe of Benjamin. 2God has not rejected his people, whom he chose from the beginning.
29For God does not change his mind about whom he chooses and blesses. 30As for you Gentiles, you disobeyed God in the past; but now you have received God’s mercy because the Jews were disobedient. 31In the same way, because of the mercy that you have received, the Jews now disobey God, in order that they also may nowq receive God’s mercy. 32For God has made all people prisoners of disobedience, so that he might show mercy to them all. 
One of the most important statements in Romans is 'for all have sinned and fallen short...' As Paul writes to reconcile Jews and Gentiles he wants them all to understand that they are included in God's family as equals. Not as one better than the other.
Lord, in my brokenness and sin you reveal your mercy. Thank you that I can turn to you again and again and you pour out your grace again and again.