"Wrong. The black guy does have more authority over me because he has personal experience, which I don't have. That alone makes him an authority."

Congratulations you've just shown exactly why I made that first post.

No, a bit of perceived potential anecdotal experience does not give someone authority on a subject.

That person could have not suffered discrimination, not have been aware that they were suffering discrimination, or misattribute something that happened to them as discrimination.

Experience only goes so far. Proper experience has the potential to be a learning experience and to give a person greater knowledge and wisdom. Keyword there is potential. There are many people who will experience something without ever learning anything from that experience.

Let's make a very general example here.

A black person goes into a store and is discriminated against. A white person witnesses that discrimination. The black person later uses that event to rationalize and justify their actions when they in turn discriminate against the group that they perceive as having discriminated against them. The white person thinks on that event and decides that discrimination in all forms is wrong and something that people should be aware of, and goes on to attempt to get friends and others they know to be less discriminatory.

Both experienced the same event however they both took something completely different from it.

Personal anecdotes and personal testimony are notoriously biased and inaccurate, even when the subject is trying their hardest to be as honest as they can be.

A black person can say, "I've experienced racism and discrimination first hand which means I'm an authority on this subject." but that doesn't mean their statement is true. A white person could make the very same claim and it could be just as wrong.

Now let me clarify my point even further and bring it down to a very basic statement.

Experience is not wisdom; it is merely the potential for it.