Looking at Sect. Kerry's past this is makes for perfect sense per his view of the United States being a worldwide monster in his book. It would also appease those who feel we do to much to make sure arms for countries and prodemocracy efforts are supplied to them. But as most UN treaties and declarations go, they never quite have the teeth to do much good and like most liberal causes, it let's those who gathered to hold hands and sing kumbya go back to their countries feeling like they have done something worthy.
What is always disturbing about the UN is that we would potentially listen to a group of unelected-non-US-citizens try to tell us what we need to do as a nation. We have enough of that problem in Washington without them adding to it!!