This is disingenuous. Just because other actors outside the US were involved, does not mean that US citizens shouldn't take action and hold their own government accountable for it's actions.

The US asked/pressured/coerced (depending on viewpoint) the NZ government into doing it. The action US citizens can take is to get our government to not do such things on the world stage - particularly w.r.t. enforcing US laws outside of US jurisdictions.