Pirates used to kill people and sell other captives as slaves. They screwed with our merchant shipping so much, demanding ransom to stop, that the US Marines had to go put a stop to it (shores of Tripoli). But now pirates are romanticized and kids dress as that for Halloween. Witches were feared and thought to be Satan worshippers. So why not think that kids of the (not even distant) future will know little about Nazis or Taliban? I can imagine the history teacher of 2040 having to hear, "Like OMG, like when are we even ever going to like use this stuff? Is it, like, going to be on the, like, test?"
(I'm also presuming that heavy use of "like" will be standard by then.)
(I'm also presuming that heavy use of "like" will be standard by then.)