I stated this in my post:
In general of course more Koreans would know about this issue than Canadians for example. But stating that only Koreans get to have a say is simply eliminating any possibility for discourse. There is a possibly that a vocal minority of such an ethnic group can be WRONG about a specific part of their outrage - where it is directed, what they think is the cause of its perpetuation, etc. The answers to these questions are in part founded on knowledge and research (in which, of course, the opinions and beliefs of said ethnic groups is very valuable!), and cannot be wholly answered by the gut feelings of an ethnic group.
Simply replace Koreans with Blacks and Canadians with Whites.
In general of course more Blacks would know (more) about this issue than Whites for example. But stating that only Blacks get to have a say is simply eliminating any possibility for discourse. There is a possibly that a vocal minority of such an ethnic group can be WRONG about a specific part of their outrage - where it is directed, what they think is the cause of its perpetuation, etc. (only listing blanket examples here! Not intended to be pointing towards anything specific whatsoever) The answers to these questions are in part founded on knowledge and research (in which, of course, the opinions and beliefs of said ethnic groups is very valuable!), and cannot be wholly answered by the gut feelings of an ethnic group.
Edit: As for your question "is [X] as valid as [Y]", most likely the average validity of a Black person's beliefs on the subject is more valid than the average validity of a White person's due to the direct impact it has on Black people, but that does not mean that there are not completely ignorant Black people who have a malformed view on the use of the N-word and its impact, and similarly there could be white university professors who dedicated their life to studying this topic and are more able to help than a large number of Black people could on the subject. (Of course there could also be much more well-studied Black professors on the subject as well!) Simply reducing these issues to an issue of race is exactly the same mistake you are attempting to end.
Nothing is simple and that is the basic point that you have to stop trying to avoid.
Simplifying, categorizing, is all a means to ease the complicated extrasensory deluge of information that comes in our lives, and it is a useful tool and helps comfort ourselves but is exactly the thing that in cases like this we should combat.