It does not appear that the court actually ruled on the constitutional issue presented in either iteration of Bond, and Reid was about an executive agreement, not a treaty.
Both of those cases discussed the issue at hand - the ability of the treaty power to supersede constitutional amendment process or invalidate other constitutional provisions. The idea was resoundingly against the interpretation you’ve put forward even if they did not rule on that constitutional issue presented in Bond. There is strong indication that the interpretation you’ve presented would not be upheld.
Reid was about executive agreement, and specifically uses the treaty example. Not perfectly controlling but it describes and discards the exact scenario you have put forward.
Well, now that the 9th amendment has been brought to my attention, I think your claim is a bit strong.
Reading the background and reasoning for the ninth amendment, it was written to avoid anyone making the argument that since the constitution and the Bill of Rights listed certain protections, say the right to keep and bear arms, that didn’t mean that other rights not mentioned in the Bill of Rights were not important.
It addressed the exact problem that is highlighted by the abortion debate. Just because abortion isn’t specifically protected in the constitution doesn’t mean that it might not be a protection. Now the argument remains whether abortion is a protected right, but the ninth amendment specifically protects the discussion. And that protection IS in the constitution.
I don’t think Roberts would allow that. Thomas would have no problem overturning Roe, and maybe even Alito. But after that, I think it gets very iffy. At the very least, I think we’d need one more “liberal” justice to retire and be replaced by a very, very conservative justice. And even then, I think it’s a long shot.
Or, split the difference: imagine a Supreme Court that says, yeah, on second thought, this isn’t really a call for the federal government; it’s a matter for each state.
So maybe it’s illegal in Alabama – but it’s legal in New York. And et cetera.
I’m not sure how that is a “split the difference” opinion. It is all conservatives have asked for: a state by state determination. Nobody except the most hard core right wingers ask for an opinion to outlaw abortion in all 50 states regardless of state laws to the contrary. Such a position would be conservative judicial activism that, IMHO, is completely unsupported by the Constitution.