This is really sad. She's really blown it now. I'm not Cherokee, either, so it's not my call. But hey, lots of people have painful family histories. Welcome to NDN Country. What she did was the exact opposite of what was needed to make this right.
One of the reasons I posted links to those blogs various Indigenous women have written about this is that they wrote about how they tried to get Andrea to make this right in the past. They've been trying for years. Women who thought they were Andrea's close friends would ask her these basic questions and Andrea would burst into tears and refuse to discuss it, and hang up or walk out on them. They cared about her and were worried about her.
So did I; so was I. I still care about her, and value the work she's done, but I can't believe anyone who is culturally Native would respond this way. She could have made this right. She could have said, "I was wrong about who my ancestors are. I really believed that I was Native, then I didn't know what to do when I found out I was wrong. I'm sorry I messed up. Please help me make amends and learn how to do this work as an honest ally." I am shocked at how big a mess she has made of this. It didn't need to get this bad, or go this far.
ETA: And NO ONE ever said this was about enrollment; that's derailing. Either the ancestors are there or they're not. I had been told there are Cherokee, including Elders, who claim her. But I haven't seen any coming forward to claim her amidst all of this.