Why should it. They were critical of churches and of blind faith. Who would blame them? It is a very ignorant view of history to think that free people in the 18th c. did not take their intellectual freedom very seriously.
In the current age of political correctness we dare not say certain things anymore. There is nothing conspiratorial about the Founders' variable adherence to what we think of as normal Christian doctrine.
I'm not making judgements about it, I just wish to know the plain facts. I think these groups are as active as ever, though completely non-transparent.
I guess I'm jealous of them too.