Occam's Razor, atheism, theism and polytheism.

[Jehanne]

Some say that we should reject polytheism because Occam's Razor says that "we ought not to multiply entities beyond necessity" (or, something like that).  But, if we are going to reject polytheism via Occam's Razor, why shouldn't the same argument apply to theism or deism?  After all, if naturalism offers plausible explanations for everything (including, "Why there is something rather than nothing?"  Answer:  The Cosmos is beginningless and endless), why, per Occam's Razor, appeal to anything beyond naturalism which would be to "multiply entities beyond necessity?"