A Sannyasin cannot belong to any religion, for his is a life of independent thought, which draws from all religions; his is a life of realisation, not merely of theory or belief, much less of dogma.
Socialists have always spent much of their time seeking new titles for their beliefs, because the old versions so quickly become outdated and discredited.
I am a Hindu by birth. And yet I do not know much of Hinduism, and I know less of other religions. In fact I do not know where I am, and what is and what should be my belief. I intend to make a careful study of my own religion and, as far as I can, of others.