A couple things.
-
Lack of established religious authority. I’m sure there were spiritualists and weird cults in Britain too but they had a far harder job displacing the Anglican church which dominated. Same for the influence of Roman Catholicism etc
-
America is nowhere as far as the major world religions are concerned, which doesn’t sit well with the kind of self obsession that infects a new nation. So it’s quite tempting when prophets and cultists etc come along saying the New Revelation™ is that America is the new centre of God’s plan.
well who pissed on your chips?