It's had multiple resurgences since WW2, and the current one may have already peaked in some places. Duda didn't exactly improve his numbers, say, and in most Western European countries the far right isn't actually looking all that healthy in polls.
I've had the flu a lot, but that doesn't mean that I'm chronically infected with it. Every time I got sick, I caught it from a different person. Europe caught it from this intermediate condition where the core of the EU can consistently take advantage of the peripheral states, generating large trade surpluses, but have to be begged to help through begrudging one-off fixes (rather than federal institutions that work to and have the means to constantly rebalance things) whenever they crash one of them by loaning them too much money to buy things from the core.
If federalism is just exploitation, the obvious last resort is nationalism.
