How many generations does one have to go back to be considered "Native American"? And if people today feel guilty over a nation built on conquest, should the 'real' "Native Americans" feel guilt over their history of conquest, murder, the occasional bouts of cannibalism, slavery, torture of defeated warriors, etc? Or should just white people of European ancestry feel guilty about what some other white people of European ancestry did? Can you name many countries and nations NOT formed by conquest, battle, and brutality?
I'm sure the people living on the reservations today take solace in knowing that they can face a myriad of social ills but at least people really really really really 'care' about a sports teams name.