Simple answer for many, yes, and many do not care.
Not only have many forgotten Pearl Harbor and December 7, 1941, many youth today are not even being taught US History, or if they are, some selective version of it. I have a 39 year old daughter in law with a masters degree who knows very little of American history, civics, the Constitution, etc, and over the Thanksgiving holiday and during a general discussion on things, I mentioned the Spirit of St. Louis and Charles Lindbergh, and she had no idea who he was, what he did nor his famous plane.
This is just one of the many topics over the past few years she has no idea on, but given she is very liberal and from Seattle, I understand she holds a certain point of view.