Looking at the ball, its colors and designs, there is no connection to any North American Native tribe. The name, Tribal, could be applied worldwide, as could the words Clan and Nation. I would say it's unreasonable to find anything offensive about this ball. With all due respect, the reaction of being offended was overly sensitive.
That one person perceives a personal offense, made by another person, constitutes a problem between the individuals or a problem in perceiving the world at large. In either case, the ball itself is a symbol of a personal matter, nothing more.
Let's allow the resolution to remain a personal matter and not blow it out of proportion by involving whole communities. Dragging out a personal problem in the public domain will benefit no one. It becomes a spectacle.
This is a time for silence, a time to simply wish the two individuals Goodwill, a time for Kindness and understanding.