I have been saying it since the EU was formed.
It will likely be economical war since they have no standing army’s.
The rest of us with army’s will be drawn in.
The Swedes and the French are major arms producers.
And it only takes five months to train an unemployed youth with few prospects into a soldier.
The Southern economies have everything to gain by both defaulting and nationalizing everything foreign owned. Actually, every nation other than Germany comes out ahead that way.
Expect the Muslim situation to be resolved in the genocidal way Europe has cyclically solved similar situations for thousands of years.