To be more accurate, he's dismissing criticism from a single person's web article, whom does not represent their minority group in a spokesperson capacity. Considering that 90% of this minority group don't care about the word "Redskin" I'd expect a similar poll on the word "tribal" would likely garner a nearly 100% don't care attitude.
This article is representing an opinion that's on the fringe of the fringe. And because it is, the topic is being heatedly debated, and because it's being heatedly debated, people mistakenly believe it's a mainstream view instead of a fringe view, and feel more impassioned to argue about it. The developer is right to dismiss it until the opinion is validated by actual Native American representatives that organize and plan for their community, not just write off a reactionary article that's attempting to push back against those praising GG for their inclusivity.
Whew, lad