The idea was, in my understanding, that Jefferson was not impressed upon by priests who hid behind the bible when it suited them, or used the bible to get their way.
Catholic or not, it was the idea of the clergy using the Bible as a way to protect themselves (or the despot) from the law, or scrutiny. Truth can stand by itself, it does not need a bible or scripture or a priest in any case to intervene on it’s behalf.
True enough, it not matter who attempted hiding their own duplicity was what Jefferson appears to had been driving at.
Careful now, lest in too tight adherence to the above way of thinking one end up arbitrarily trashing what Truth there is within Judeao-Christian Holy Writ, and can be uttered also from the mouth of a priest, both those I had previously mentioned -- Anglican, and the more Romanist sort of Catholic, so-called "priest".
Those both can recognize and speak truth upon occasion, at the very least, the question there being -- how to determine when they are, and when they are not.