Look up the movie "UN me" it discusses this topic. My personal opinion would be that it strayed from it's original intentions and now has become an organization that does more harm than good. But whether it is "sinister" (implying that it is intentionally doing wrong and evil) is up to your own judgement.
World Health Organization
it is dead
UN is the Peacekeeping Organization abbreviation for the United Nations.
UN
The United Nations, UN, is an international organization. The organization has assisted globally to curb hunger, improve drinking water, and assist refugees.
The "Leaque of Nations", established in the Versailles Treaty of 1919/20, was replaced by the UN in 1945 after WWII ended in Europe.
The UN.
UN(United Nations)
Though not exactly the same the League of Nations was a precursor to the UN.
A bar sinister is a non-standard term in heraldry for a bend sinister or baton sinister, found on a coat of arms.
It's more of an international organization. It's a multilateral organization comprised of the world's governments.
United Nation (UN)