The problem is that it makes, imo, Zionism fall apart if it really is a matter of religion.
I can only assume you are not very well aware of how culture and religion mix and influence each other in Judaism. Not that I am an expert or anything, but I have learned some things along the years, not all of them being how to gain weight and lose hair.
Even for Orthodox Rabbis, Judaism is mainly about union and mutual duty. They take religion a lot more seriously than the average Christian or even Muslim community, particularly on the matters of accepting each other and paying the prices for doing so. It is not about belief and, in a way, it is not about conversion either. It is about family, including adopted (but earned) family.