That Pan-Babylonialism is 24 Carat pseudoscience comes as no surprise!
Also during the same “Free Home Bible Study” phase, I remember being assured that all the world’s major languages originated in the ancient city of Babylon. To put matters very diplomatically, this is simply not the case!
Little about the religion of Babylon was exactly original, either. Most of it had been inherited from the earlier Sumerian civilisation.
Hardly the birthplace of either the world’s languages or its religions!