America wants a bob each way; it wants to go interfering in the affairs of other nations - either through advisors/economic means or attack, depending on the stance of the nation it is dealing with, but doesn't want to be brought to brook in an international forum.
We may not like US gun laws or the use of the electric chair but have no right to interfere in the nation's inner workings. This is alright as far as it goes (trying David Hicks, an Australian citizen, is a far different story). Live and let live - or die as the case may be.
But, no, the US goes butting its nose in everywhere, telling other peoples what to do and how to do it. Then they refuse to be judged in return. This is rank hypocrisy. What is so special about the US that it can seek to impose its will without holding itself up to accountability? It's bigger and stronger. Bad reason. China is a mighty nation also. And North Korea is formidable. But their human rights record and international adventuring suck. And wouldn't it be nice if an international body could have just waved its finger and said 'you back those tanks right out of there and let the people be'? Or "Get the fuck out of Tibet. Now"
By being selective in deciding when international agreements should be adhered to, the US provides no reasonable guidance for arrant nations to follow. In fact, I would not recommend that any country follow their lead.
I mean, what can the US reasonably say?
Don't rig your elections like we did in Florida.
Don't overturn democratically elected governments like we did in Chile.
Don't attack or invade sovereign nation states unilaterally like we did in Iraq.
Don't oppress your minorities and native population like we did with the African Americans and Native Americans (to use the modern pc terms).
Don't discriminate in your immigration policy like we do with our Green Card.
Don't spend on military at the expense of social programs like we do in the extreme.
Don't pollute the environment as we do so ostentatiously (ah for the day when the US adminstration is run by solar energy and windpower barons!!)