Generally, the entire Constitution is seen as having equal weight; there are not tiers of authority (unlike in the constitution’s of many other nations, which make certain provisions suspendable). Thus I have always been puzzled by the dominant view, well-articulated by Prof. Pildes, which manages to account for Missouri v. Holland and Reid v. Covert by saying that treaties can expand legislative powers but not infringe the Bill of Rights.
I do not see a strong basis to exempt just the Bill of Rights from the the general rule of treaties, whatever that rule may be, for several reasons. Mostly, I see no way to neatly sever the Bill of Rights from the rest of the Constitution.
1) There is no other area, to my knowledge, where one can override enumerated powers but not the Bill of Rights. If anything, the latter are at least waivable by individuals, while the former are not.
2) The 10th Amendment, reflecting the principle of Federalism, is of course part of the Bill of Rights. So the position must be “the Bill of Rights, except the last bit,” which seems even more selective.
3) Could a treaty override Bill of Rights protections against action by the states? If not, this means treaties can override everything except Amends. I-VII, (maybe XI, see below), and XIV, D.P. Clause. That sounds even more selective.
4) Individual rights protections are contained elsewhere besides the Amends. I-VIII. Take the jury trial provision of Art. III: can treaties override that? (It is not a hypothetical question, as this would be the effect of signing the Rome Statute of the International Criminal Court.) What about the President’s pardon power? We can imagine the creation of mixed courts for treaty crimes, with convicts made unpardonable.
5) Now lets turn back [...]