So, while its nice that you read the named plaintiffs, it would probably help if you read the document beyond the names of the parties to get a clear understanding of what is actually going on.
http://www.ncai.org/attachments/LegalBriefing_TByaxkdqYwYRDo...
Note that the first two listed are:
Amicus National Congress of American Indians ("NCAI") was established in 1944 and is the oldest and largest national intertribal organization; it represents over 250 tribes, nations, pueblos, and Alaska Native villages with a combined enrollment of over 1.2 million.
Amici Cherokee Nation of Oklahoma, Comanche Nation of Oklahoma, Oneida Indian Tribe of Wisconsin, and Seminole Nation of Oklahoma are federally recognized Indian tribes that have adopted resolutions condemning the use of Indian names and mascots by sports teams.