Good, you agree that Kofi's opinion is insignificant.
But as a matter of reality, others do and they may be willing to take actions asserting that position. Simply pretending that they are not there will not make them go away, which returns us to my initial question.
So now you're back to saying Kofi's opinion is significant. I don't care if those that agree with him will go away or not. What are they going to do? Kofi may think the UN Charter is the supreme law of our land. Most Americans don't. Therefore his opinion is insignificant. Now if the UN was prepared to invade the United States to throw away our Constitution and establish the UN Charter as the supreme law of our land, then Kofi's opinion would be significant. But right now, without the US, Kofi's opinion is insignificant, because Kofi has no military power without the US.
No. I agree that Kofi's opinion is of little credibility per se in m own view. That does not preclude it from being an opinion that others pay attention to or act upon. Surely even you can recognize that simple distinction.