While I think some people who are in the international governments really want to help certain cultures. Many International organizations do indeed seem to want to make other cultures function just like theirs. Instead of trying to dictate how other cultures should live maybe international law should just show by example.
International governments and organizations are not trying to destroy cultures. They are founded to improve international relations for trade and to make travel easier. They also exist to build international bonds so as to prevent the outbreak of war in the future. International governments are good for world peace, and they do not harm national cultures.