A religion is just a belief system for any people. Judaism is way more than just a belief system and it is only for one People.
When a member of any religion rejects the belief system of their religion, they are no longer a part of that religion. If a Jew were to reject the spirituality linked to their identity, they would still be Jewish, not more or less than a practicing member of their People.
Almost every native or indigenous population has spirituality at the foundation of their culture, so just because many of today's modern nations omit spirituality from their way of life or identity does not mean native civilizations are religions when they have spirituality at the core of who they are.
Judaism is the portable culture, way of life, identity, and purpose of an ancient civilization indigenous to the Land of Israel, which was created to preserve the Judean/Israelite civilization while in diaspora.
Video filmed on the Breslev English podcast.
