And their lives are the better for it, so they can stfu.
stfu about what?
she used her ancestors strife, trail of tears, as an example of coming from mistreated group of people. If a white person wants to use their native ancestors' suffering as justification for their racist diatribes about blacks, they can stfu.
If they look white and want to complain about it like they had to overcome something in general, they can stfu.