On your second paragraph, you are possibly misunderstanding my position. I agree with you whole heartedly on that. This ban is long overdue. I have never eaten a NZ crayfish, primarily for this reason. I don't want to be part of the collapse of the whole ecosystem, with respect to kina barrens and the wider impact of that on juvenile fish habitat.
But I'm not really following the point of your first paragraph. I do note that it appears politically incorrect to question any race based rules in large parts of our society today. I don't think that is healthy. Most people are just too scared