That's a neat video but I think that usage of euphemism is a little different, based on how they used it in the video. I'd call that more of a "dog-whistle" - you use a term like "war on terror" because your base understands that you means you hate muslims and would like to stick them all in a death camp, while the establishment can still go on CNN and not have to answer questions about "muslim registries". But yeah its kind of hard to relate to previous eras of politics when shit like this mattered to most people.