As you can tell by his appropriation of a stereotypical Plains headdress, Nugent has a checkered relationship with Indians:
I suspect Nugent has a typical mascot lover's "appreciation" of Indians. He loves traditional Indians for their semi-mythical warrior prowess, but thinks today's Indians are moochers and bums. Just a guess, but I've never heard him do anything for Indians other than stereotype them.
For more on the subject, see Nugent Dons an "Indian" Headdress and Shoots a "Buffalo."