«If so, fine. If not also fine. Which brings us back to the old, vexing question: Is Judaism a matter of what Rabbis say, or a matter of what Jews do?»
DOVBEAR: Oy Gay
To answer DovBear's question it's a combination of
The Zohar says "Yisroel v'raitto v'kudsha bkrich hu had hu"
Similarly, Halachah is also the product of an amalgam. Re: this specific issue, more later BE"H