You sure about that? Not a single one of these nationalists are speaking of getting away from socialism. Now if they were actually speaking like the USA’s Founding Fathers, I’d be among the first of those to point that out. But saying things like “better European Union” is just pure imperialism.
My reference to Washington and the founders was in regard to not wanting to be under the thumb of Britain, to opt for self determination.
Whether, after regaining their sovereignty, they stick with some level of socialism or free market, that remains to be seen.
I see self determination and choice of economic system as two separate things.