You're picking at details, which they are good at deflecting. Concentrate on the CORE of what's wrong....
Why does the society prohibit questioning the org at all?
Why MUST you agree completely with their current teachings, when they reserve the right to change them? (But, you cannot attempt to anticipate the changes - that's 'running ahead of the org').
Why do they attempt to regulate, not only your life, but your thoughts, as well?
Don't attack specific older doctrines, ask instead why, 'when Jesus returned in 1914', he picked their organization as the truth, with all of those doctines that have since been overturned. Either the lord in heaven made a mistake then, or the org is mistaken now....
(and, if you ARE going to nitpick, I'dve picked better topics. The UN thing is generally greated with a 'who cares'. The pedophile thing they've always had plausible deniability in. As long as you question specific doctrines that've been overturned, they can deflect the questions with 'new light'.)
You'll need to target specific teachings that are currently unsupportable - ask about 1 Sam 14:32 - why was a loyal army allowed to eat blood for their convenience, and a modern Christian cannot take a transfusion to save their lives? Why do they assume the 144,000 in Revelation is a literal number when the surrounding text in that chapter is figurative? Why do they continue to maintain Jesus died on a stake, when we have proof romans used CROSSES to execute criminals (not stakes - CROSSES)? etc.
(Oh, and in case you feel these are minor issues - tell them that you are certain of your beliefs in these few matters and won't be changing your correct understanding of these things, and see how they react).
Xander F
(Unseen Apostate Directorate of North America - Ohio order)A fanatic is one who, upon losing sight of his goals, redoubles his efforts.
--George Santayana