Not at all. The UN Charter contains nothing about ending war. It only advocates force to bring about peace, but that use of force is in itself war. If we had some assurances that such a forum wouldn't go beyond that function, yes. It's kind of like having someone in every household in your neighborhood invited in to mediate your family spat.
Interdependence is a fact.
Isolationism is the bogeyman that the CUIC trots out everytime someone voices objection to globalist plotting. In fact, the United States has always had a vigorous and extensive involvement with other cultures. Whenever the UN feels that military action is warranted, they call upon member nations to provide troops to make up the force. It's much like when any nation goes to a wartime footing. The danger lies in the fact that in all probability, the UN would turn into a military dictatorship.