You are treading on dangerous ground my friend. The best advice I could give you, and as many others here have said, you should try to AVOID it.
While it IS noble, and courageous, to want to show them the U.N. issue, they will NOT look at it that way. You will not be among listening ears. They, most likely, already have a pre-conceived notion that you are leaning towards doubting "Mother", and this they cannot accept.
The fact that it is ALREADY happening with at least 2 Elders, lets you know that there is more to it. They are coming "fully armed", ready for a "fight". There will be NOTHING that you can say, that will make them see your points, or "enlighten" them in any way.
As others have mentioned, and I feel is your BEST option, is to say, "Oh its not really a big deal to me, and honestly I don't know why I have to speak to more than one Elder about this". Spin it around on them, and say "Wow, now YOU are making me think there REALLY is something going on concerning the U.N, I didn't think it was that serious". Say, "in fact I did a little research, and prayed to Jehovah about it, and I found out it really was NOT that big of a deal". Say, " if you want to discuss it ONE on ONE, that's cool, but it really doesn't bother me now, thanks anyway".
Now I completely understand that YOU do not feel that way, and it IS INDEED a VERY big deal, but you need to protect yourself, for the sake of your Wife. Do not think that you might be "awakening" them, and that by you doing this, it will wake up everyone to TTATT. As awesome as that would be, it just wont be the case here. Especially with these "company men".
Protect yourself, and your marriage, THAT is the most important thing. Down play it, and do damage control NOW, to get yourself out of this situation. The best thing would be to NOT be in front of 2 or 3 Elders, and discussing this. You do NOT want that.