Arguing with/about this "Artist" will accomplish nothing. As long as Museums choose to present this display to the public, and it gets everyone in an uproar, it will continue to exist.

There are worst groups out there displaying the Confederate Battle Flag as their symbol, causing more damage than this display.

Other battles are more worth fighting for, don't get stuck wrestling in the muddy trench this guy is trying to get you bogged down in.
Respectfully:

Kevin Dally