Romans 9:8 That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed.
The Jews were thinking that they were ok because of who they were and who their parents were. They were born into the right family. They had the right heritage but failed to realize that God is not interested in who your mother or dad is but if you have come to the point that you realized that you sinned against a Holy God and need to be saved.
You will not get to heaven on anyone’s coat tails. No one else can make the difference for you but Christ.
Do not rely on anyone else or what they have done but the finished work of Christ.