You're proceeding from the false assumption that she has any credibility to begin with, lulz...
But, since you want an answer...It's the same answer for anyone who owned slaves and has a statue taken down. Or wrote a critically important book about growing up as settlers but is now defamed because of a few "bad words" regarding race. Or maybe lied and got a bunch of Americans killed and then continued to violate laws. Or the same amount of time that it takes to forget that abortion isn't about viability and never was (cough New York cough). Or the exactly same definition for being Native American - or maybe getting your citizenship for Ireland.
I honestly think you're just mad that someone showed up and used the same race card against her that she tried (and failed) to use. See, what you have there is called "cognitive dissonance." You can't reconcile your thoughts and beliefs when the argument is effectively turned around. You're just trying to prove racism where none exists and quite honestly, it's hilarious. But on a more serious note, you should stop trying to be offended on behalf of other people. Because you're doing the exact same thing Cortez is doing. and honestly, it's insulting because you're saying that these "other" people either don't have the intelligence to be offended for themselves or are incapable of standing up for themselves. And that, sir/madam, deserves a "How dare you" because it's just another form of racism.
well we know Puerto rico has a real mixed bag when it comes to ancestry. Puerto Ricans, on average, have genetic contributions from Europeans, West Africans, and Native Americans of approximately 66%, 18%, and 16%, respectively.
We know there were Jewish refugees from spain there.
https://en.wikipedia.org/wiki/History_of_the_Jews_in_Puerto_Rico
so she owns having a jewish ancestor someplace in the family tree, and you conflate the is being 100% jewish.
The question remains, how main generations is sufficient to remove stain her credibility?