Well, according to Torah, I hold that diplomacy means hypocresy and thus it would be forbidden by the Law. Righteous nations should rely on Hashem, not in the UN. But we know that Israel won't leave, except when Redemption comes. And it would be great step if Iran is expelled, there is a base to claim that. While many other nations have also acted agianst the puropses the UN claims to defend, Iran is the only one which threatened to wipe Israel ( a memeber nation) from the map. Arabs did, in fact, the same, but they claimed that they had a conflict about land with Israel (which is anyway wrong). But according to the UN policies not so serious. Iran is threatening a member State (Israel) with which it has no territorial conflicts. And once it is expelled, Arabs will probably be more sincere and side with Iran, thus losing all credibility.
And why moving the thread to Mods section so noone can read it?