Why doesn’t the Administration of Harvard have to bear some of the blame on this ?
It’s not like the staff of one of the highest rated academic institutions couldn’t tell she wasn’t any kind of ‘indian’.
If you are 1/32 Indian you may be able to qualify as a member of some tribes - and that doesn't always show in your appearance.
You could argue that Harvard was unethical in playing up Warren's claim to be native American, but I doubt they violated the law in taking her at her word.