I hope this isn't a majority of the protesters but it's an element. It has not been debunked as is being reported in a fake press release, supposed to be from AP. Quite the contrary. [buzzfeednews.com]
It could well be fake, but having said that, a knowledge of history can not be taken as a given among such people, and I strongly suspect that they are quite close to holocaust deniers and other such crazies, she may not even know what it means, so who can tell.