Reddit mentions of Two Powers in Heaven: Early Rabbinic Reports about Christianity and Gnosticism (Library of Early Christology)

Ayyyyy, now that’s what I’m talking about. This is the kind of academic studying we need more of.

Edit: Check out Alan Segal’s book Two Powers in Heaven which kicked this whole thing off, followed by Michael Heiser’s work which you can find some of at https://twopowersinheaven.com.

There's a book called Two Powers in Heaven by Alan F. Segal. "Alan F. Segal (1945-2001) was Professor of Religion and Ingeborg Rennert Professor of Jewish Studies at Barnard College". The book goes through the historical record to show that 2nd Temple Judaism had a strain which believed in something we might call "Binitarianism" because of what they saw in the Scriptures.

Dr Michael Heiser has this video discussing it here. Christianity is monotheistic. Marcion was an ignorant heretic.

EDIT: The idea is that the Bible, starting with the book of Genesis teaches one God in more than one person, such as when the Lord ate with Abraham as would a man before the Lord walked over and rained fire on Sodom from the Lord in heaven.

He might actually be right about the two powers though?

Here's the book he's talking about.

https://www.amazon.com/Two-Powers-Heaven-Christianity-Christology/dp/1602585490

Highly recommend this book:

Two Powers in Heaven: Early Rabbinic Reports about Christianity and Gnosticism (Library of Early Christology) https://www.amazon.com/dp/1602585490/ref=cm_sw_r_cp_apa_i_WudIDbJFHAYD8