Maybe, I guess I just have a hard time taking posts on an internet forum seriously. Even the Op Ed piece linked in the op didn't seem to be suggesting it was that serious, more of a hey, isn't this weird?
Again, I compare it to the small fingered drumpf stuff, it gets brought up all the time, it started in an op ed by...Rolling stone? some periodical or other. Its not serious and effectively nobody takes it as such.
She can't actually make it go away because it's too funny but she can respond better. A simple, this is the story my grandma told us, are you calling my grannie a liar?* Rather than her response which seems to be, "This was a big part of my childhood and who I am" Which rings hollow when coming from a blond haired blue eyed law professor.
Probalby not that last bit but simple, this the story my family believes, lots of folks in america have a story just like it with just as little evidence. Again, "I'm 1/32 Cherokee" is a bit of cliche'd joke.