No, a true Jew is one whose heart is right with God. And true circumcision is not a cutting of the body but a change of heart produced by God's Spirit. Whoever has that kind of change seeks praise from God, not from people.
Scripture quotations marked NLT are taken from the Holy Bible, New Living Translation, copyright 1996. Used by permission of Tyndale House Publishers, Inc., Wheaton, Illinois 60189. All rights reserved. (New Living Translation - The Bible Online)