What God really cares about, is if we are born from above, born from him.
According to Jesus no one can see the Kingdom of God, unless they are born again.
We are spiritual Jews, because we are born again from the Holy Spirit. God looks at the heart.
Jesus condemned the Pharisees, because they nullified and ignored the Word of God, in order to keep their traditions. It is possible that they thought keeping a tradition made from men will save them.
Jesus did not like their ignorance of his words, which could make them to become a people, born again from above. They thought that by being naturally Jews, by birth, and keeping men made traditions is the key to go to heaven.
But God recognizes only one type of a heart, which is circumcised by the Spirit of Almighty God. The heart which has become a new creation in Christ Jesus. That heart is a heart of a spiritual Jew!