Between me and my families I think we own one house that's not worth anything because of it's location and my apartment which I'm still paying off.
So if my country got attacked I would grab my family and leave without a second thought - let the people who divided the profits and live off the benefits defend it - I would be just as well in any other country.
Now if it came to world war and it was Russia and China taking over the west I would feel differently about it - but in that case it's a nuclear armageddon so I could probably do shit.