There are plenty of team names that honor Native Americans
A Seminole was a member of a proud and successful (for many generations) tribe. Brave, Warrior and Chief were all titles of honor, respect and achievement.
Redskin? It was a term referring to the bounty on dead Indians, because, well, you know, the only good one was a dead one...right?
Imagine that being part of your heritage and history. That name would constantly be a reminder of how your forefathers - YOUR people - we're regarded as pests to be exterminated.
There's nothing wrong at all with a name that refers to a proud and good people. But do we really need to rub their faces in the most cruel chapter of their history?