I don't quite get how Esperanto could have prevented the Holocaust when it was persecuted under the Nazis.
What is scary, however, is that as one of a number of artificial languages...
There is a saying here. "If you become a fire, you can burn yourself only." Nazis were not millions of ordinary folks, but, the designers wanted to spread the fire to millions of ordinary folks so that those designers could play their games for the oil (I see those two world wars as oil wars.) Esperanto-like attempts, that might have failed, were useful to keep the fires away from ordinary folks. So, it was a good attempt for their beneficiary of ordinary folks, sure for those ordinary Jews also, but also for all other ordinary folks.
Similar thing happening these days. Wikileaks focusing the light onto the middle east mostly and ordinary folks in Egypt, Tunusia, etc are having troubles. Okay, they are not the good democrat places, but, Britain Kingdom needs to enlighten themselves first. They don't have any right to teach democracy to anyone while themselves are a monarchy. Some may look at the things the light show, some people like me look at the footsteps of the holder of light that are in Britain now. See, ordinary folks have not changed by looking at the places under spot lights. You still questioning him, Jewish or not, while the designers were about the oil actually.
Artificial language? Maybe or maybe not. Airplane too can be considered as artificial if you compare it to the birds, but, we know airplane can be useful for ordinary folks to bring people together. If you carry the bombs by airplanes, then, they are the ordinary folks who will die mostly. Dying not a problem, but, if you become disabled by losing a leg, etc, it is a serious problem then and you may need artificial legs.