As long as Europe isn't a nation, it can't be nationalism. Maybe intrantionalism?
India is a lot like Europe (many traditionally separate cultures which were historically separate) and yet managed to have a nationalist movement. Part of that is attributable to colonialism, but I think that shows it's entirely possible to create a nation when there was none.
> luckily thanks to internet and social networks kids does not really develop sense of nationalism to their country as they can tell no difference between somebody from Albania, France or Niger...
That's both incorrect, younger generations do develop a strong sense of patriotism, it is even actually on the rise in Europe, and a ludicrous and very sinister rejection of culture ("few obscure traditions of their ancestors"... sounds like New China or the USSR...)
In fact, in the current international context what the article describes is the rise of a pan-European nationalism.