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>> “G-d revealed Himself to the entire nation of Israel, at least three million people, at Mount Sinai in 1312 B.C.E. That is the basis of my religion.” <<
What Yehova delivered at Sinai is the foundation of the Covenant. It is not “religion.”
Religion is all of the attempts by men to do it some way other than what was delivered at Sinai.
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And then...
Jesus revealed Himself to Israel.