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That's speculative. What is true is that the hexagram in one form or the other was used by various esoteric traditions. I haven't seen a definitive description of the Star of Remphan as it's not described in detail in the passage you mentioned. It's just as likely the jews co-opted it the same way they've co-opted many Western symbols ober time. There's a lot of funny stuff going on with American iconography but leaping to conclusions is not productive. The founders also used the olive leaf, fasces, and other traditional western icons.