Quote Originally Posted by Pindar
The intent of the UN is found in its Preamble:

We the peoples of the United Nations determined to save succeeding generations from the scourge of war, which twice in our lifetime has brought untold sorrow to mankind, and to reaffirm faith in fundamental human rights, in the dignity and worth of the human person, in the equal rights of men and women and of nations large and small, and to establish conditions under which justice and respect for the obligations arising from treaties and other sources of international law can be maintained, and to promote social progress and better standards of life in larger freedom...

Fundamental human rights and justice are antithetical to totalitarianism. To the degree such are allowed access and influence to that same degree the intent of the UN is undermined.
You might want to note that saving succeeding generations from the scourge of war comes first in the statement, and only then does the reaffirment in the faith in fundamental human rights etc. follow. In any conflict between the two, the first usually prevails - war is not a good thing, and its prevention was the primary purpose for the establishment of the UN. Only when the latter is grossly abused does it override the desire for peace. Would you rather there were an authority that overrode the desire for peace so as to guarantee fundamental human rights and justice for everyone?

May I direct you to a manga called Nausicaa of the Valley of Wind, by Hayao Miyazaki? The world in which it is set is one which had been devastated by a race of monsters during a period called the Seven Days of Fire. The race of monsters was actually a set of bio-engineered creations, endowed with sentience and fearsome weaponry (read nukes) so as to enforce law and justice on a warring world. Inevitably, they found all sides were at fault, and proceeded to nuke every corner of the Earth, then turned on themselves as their actions had equally offended the justice they had embodied.

Most of us recognise the world isn't perfect, but in trying to make it better, we do what we can. You are seeking an absolute truth, a world where there is justice and universal rights for all. That isn't going to happen, especially if you disregard the greater evils that may be done in their name. Stop being as inflexible as Tribesman.