I've thought something like this for a while:
These attitudes suggest that the EU could be devolving from a nascent super-state to something that increasingly resembles the Holy Roman Empire, a fragmented landscape of small, unimportant states wrapped in a unitary, but ephemeral crepe.
If this is so - and I fear it is, the need for a sustainable reform of EU institutions become imperative. Without this Europe as we know it could well collapse into the sort of bickering autarky that organisations like UKIP and the Front National increasingly present as their preferred future.
We need to begin presenting an internationalist alternative to both petty nationalism (UKIP, SNP, FN, etc.) and to the fortress Europe policies of the EU elite. Only Britain has the desire right now to have that debate and, in the UK, only the Conservative Party dare challenge both those sclerotic EU institutions and isolationist nationalism. And that referendum is essential as the lever to make Europe change.