COOKIEMASTER - I think you are 110% spot on. For JWs, God is not god. . .. . . "the society" is.
My personal experience:
When I fell into a black hole about 10 years ago, I pretty much realized there is nothing out there, no god.
But I KNEW that I still had the TRUTH! Weird, huh?
Then, when I wanted to "step down" as an elder, I literally told by PO my darkest thoughts/feelings: there is nothing out there.
I was deleted as I wished, and really have not been bothered by the elders since.
So yes, I think you are right: if you "make fun of " the bible and/or the biblical God, you can get away with it because that is not the JW god.
The Watchtower is.