What are trying to say exactly? That only beliefs in a god or gods are really religion? But that any strongly held set of principles is given the same benefits by law as a real religion? What’s the point? If it is treated like a religion by people and by law, who cares if it involves believing in a god, or many, or none??
Religion is metaphysical, ethics are not. Simulation theory might pass as a religion, opposition to animal testing doesn't. Of course the latter does involve a moral axiom but one a lot more simple than religion's vast bundled sets of axioms in scripture...