As a grandparent, why is b’nai mitzvah an important milestone for your grandchild’s Jewish identity?

We’ve heard from grandparents of interfaith families that one of their big concerns can be around their grandchildren having a b’nai mitzvah. We hear that it can feel like an important marker of their Jewish identity. Will you share your perspective, if these statements resonate with you, about why? Why is the b’nai mitzvah so important to Jewish identity? (We will publish select responses. Our director of content will be in touch if yours is selected.)