TD, as usual, makes an excellent point.
I was an active JW not very long ago but for at least a decade before getting out I was certain that the GB didn't have direction by Holy Spirit. They were too obviously and demonstrably wrong about too many things. Comparing them to Israel was something I did on a regular basis with the rationalization that even when Israel was at their worst, they were STILL God's people, His Organization on earth.
At the time it didn't dawn on me that when Israel was at their worst, the "good guys" in the Bible were the ones who had the courage to speak out against the Borganization of the time. Guys like Jeremiah and Jesus Christ.
I have Robert King (ewatchman) to thank for helping to wake me up. His book is just Watchtowery enough to make sense to a doubting/questioning JW who isn't ready to turn apostate but knows something's wrong in Brooklyn.
Of course, his doctrine is every bit the lunacy that all apocalyptic religious doctrine is, but it was an important first step for me, and I can see how it might be a relatively nice and easy first step out for other questioning JWs, too.