Combined with the other ongoing conflicts it really feels like we’re in a WW3 era
About 70 million people were killed in WW2, as of the present day about 1 million have died in the war Russia is waging against Ukraine and about 70k people have died in the Israeli/Palestine conflict. The horrors are most certainly real. But WW3 this era is most certainly not, that's thankfully off by an order of magnitude.
We could say that Ukraine is the current Poland.
I look at European leaders and they don't seem to remember it any better.
I don't see why you think that. That didn't work for Hitler, Göring, and the countless numbers of WW1 veterans in the SA and SS hungry for another try.