If you are accurate that “Nobody under the age of 40 gives two sh*ts about anything that happened in WWII”, that fact is a reflection of the abysmal work of the public education system.
Learning from history is essential if we are not going to repeat the mistakes of the past and repeat the successes thereof. Learning from history is one Reagan said we are only a generation away from losing freedom.
They ought to care or ought to be taught to care. Or things will get worse.
You’re correct, it is a product of the public ed system. Anecdotal case in point - I homeschooled three kids until finances dictated otherwise. My son went to D.C. yesterday as part of a school trip, visit included the holocaust museum. He came home and lamented the fact that he was the only one who knew the facts before crossing the threshold. Not the first time one of my kids have come home and told me that they are very different in knowledge, specific to this subject as well as generally historic.