Are they not? I'm open to seeing the information or argument that they aren't if it's available.
They are volunteers, which are unpaid employees, who are still subject to the rules and practices of the company they are volunteering for. Under that idea, I would contend they are technically "employees", and to be dismissed based on their race as the sole issue falls under the statutes I highlighted.
Example: If a "volunteer" had accosted someone while at work for the museum, could the museum be held liable?.. since the individual is "employed" by the museum? Just because the "employee" is not paid, and does it voluntarily, doesn't mean they are not "employed"...
If have something to contradict that, then I'm open to it.
It's still stupid and racist as fuck.