The historic nation states of Europe are many of them far from really that

Case in point: Spain.

Tensions high as Catalonia readies for disputed independence vote

Is the anti-EU, nationalist/populist European right on board for the eventual European consequences of their alleged ideal of a world of actual nation states?

At least The UK, Spain, Switzerland, Belgium, and The Netherlands would be partitioned each into two or more new and sovereign nation states each more deserving of the name than its parent.

That some of the areas seeking to form new states strongly approve and would want to join the EU dilutes the harm done to the EU by secession movements within some of its major member states.