I always find funny when US politicians believe US law applies worldwide...
... but only in the interests of American citizens, of course. So they are worried about the First Amendment worldwide, but have no issues if the basic rights of foreign citizens are violated by NSA or FBI.
They could have used the Universal Human Rights Declaration, maybe, but most of actual US politicians look wearing blinkers, and can't really look beyond their US-rooted noses. Also, UHRD may be a double-edged sword...