I feel we're riding a knife's edge and there's a hurricane brewing in the gulf of absurdity.
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Incidentally, I feel like this is why it is so hard to actually learn from history. You can read about the 1918 'Spanish' Flu, but you think "we're smarter now". etc.
Also, if your grandpa likes telling war stories, it's only because he survived.
As someone whose parents, grandparents, and entire family lived in Italy through WWII (and one grandfather who lost an eye in WWI), nobody liked talking about it.
If they did talk about it, it was usually brief and imbued with a feeling of "thank God it's over. what a tragedy that we were all used as pawns by the political class for nothing more than selfish ambitions."
There was a prominent component of political scheming to his rise to power, and it was a totalitarian state that murdered political opponents even before it got to genocide, but he was enthusiastically supported by a large portion of the German society.
And there's no doubt about it - it was a myth. Most of Germany stood behind him, and were outraged by the failed July 20th coup... In 1944. Ivan and Uncle Sam were kicking down the door, extermination camps were working overtime, yet most people were still fully behind him.
The hardest thing for people to admit is that they've been duped.
Most of Germany had seen the defeat of 1918. Once a war is started the only way is forward.
Anyone picking up the paper could tell that the war wasn't going to be won by them in 1944. It was two years after Stalingrad, a year after Kursk and Italy's surrender, France was being liberated, Finland was collapsing, and Germany was fighting a three-front war.
Compared to all that, 1918 at the time of the armistice looked down-right optimistic.