Jeffro
No, you’ve made a category error. 🤦♂️ Millenarians (specifically the belief in Christ’s second advent bringing about the 1,000 year reign) are Adventists. You may be confusing the term Adventist with the more specific ‘7th-day Adventists’ or some other offshoot. And the connections between the Millerite and Bible Student movements are well established. And all of them are offshoots of Protestantism.
If you really want to get specific, I suppose you could say JWs developed via the Bible Student movement via Adventism via Millerism via millennialism via Protestantism, but it still doesn’t get around their Adventist origins via Protestantism --
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Utter nonsense. Have you read the book that i cited-?