Its just a simple mis-reading of your story.
I was certain you WERE holding her up as an example of how to deal with racism. Which is why I didn't interpret you getting thru the line as a joke, but rather as evidence your purported solution had worked.
And because I have read your earlier work I added that preface sentence since this piece seemed quite out of sync with your thinking.
I will read more carefully in the future! thx.