Should the US move out of the United Nations body?

http://www.moveamericaforward.org/?Page=Petition

What do you guys think?

my rant: if the US move out of the UN, the organization will ultimately become void, and that’ll be a blow in the face of peace. I hear the arguments for the US to move out, but I don’t agree with them. I really don’t think the United Nations is a keeper of terrorism actions nor does it play any part in letting terrorism grow more and more.
The UN serve the really philantropic purpose of keeping peace among nations and does its job better than any country could (US included, especially since it is being belliquious).
By moving out of the UN, the US is risking a replay of the Society of Nations downfall, the one that led to the rise of extremism, fascism and nazism…