Lots of Irish fought against the Germans along the Brits in WWI.
The fields of Flanders were soaked with their blood.
The fact is that we Europeans shouldn't fight eachother.
I am against any "nationalists" that fight other Europeans , in order to weaken ourselves.
But, I am for the right for self-determination of all people, and some European nations don't respect this right.
e.g.: Belgium doesn't respect our rights as Flemish.
Spain does not respect Catalonians, Basks.
France does not respect the rights of the Bretons , the Basks, the Corsicans....
The UK does not respect the English, but at the other hand respects the Welsh, the Scots,....
Germany was also way better as a collection of tiny states, then after it was united into one big nation-state.
That's why I am against the European Union, it will lead to more wars (against Serbs e.g.) , and it is bad for the economical competition between the member states-regions...
For a Europe of the regions!