The UN is Satan's organisation, why would they ever wanna CALL them up??
Far too risky, especially considering the pertson already has a persecution complex, suffers from innordate amounts of guilt just from looking at the document and considering it...
I personally stick to the Bible, impress the importance of Jesus in the NT, as opposed to God, and fling in Matt 24:23 without discussing it, I find they often sit in silence after the chat, and come back to that one. It's pretty damming and straightforward.
Only using the Bible works for me, every time I've pointed out flaws in the Society, they view it as an attack and close down. Forgotten the scripture now, but the blind man led by the blind will suffer the same fate, that drives a wedge in the breach that matt 24:23 creates..
Any other ideas?