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WIPO and it's relevant treaties provide a range of mechanisms for dispute resolution through diplomacy. The issue is that the US does not engage in diplomacy.

I think most scholars of international law would disagree on the legality of unilateral economic sanctions, since they are likely to amount to interventions and as such violate sovereignty, and, of course, human rights of the people affected. You also seem to think of US sanctions as if they were in a vacuum and not a preamble to aircraft carriers, narcoterrorism and other JSOC responsibilities, and possibly nuclear warheads, or less commonly, explicitly genocidal actions.

Right, so you meant that South Africa disagreeing with the ongoing genocide in Palestine in which the US is a main offender amounts to sabotage of diplomatic relations. As for refusing to "negotiate [...] about tariffs", why would anyone? If I punch you in the face, shoot a kid in the face, and then tell you to sit down by a table and negotiate how much you should pay me for that service, would you sit down and act as if I'm a reasonable, rational actor?