As you say, having done everything in their power to undermine the institutional effectiveness of the EU, the Eurosceptics cannot reasonably turn around and blame the results of their own actions on the EU. Nonetheless, that's exactly what they do. It's very similar to the Republicans in the US making sure the federal government can't pass any bills, then blaming 'big government' for being ineffective.

Case in point: The migrant crisis, caused by large numbers of refugees coming to Greece and Italy's wide open coasts. How did they get there? No unified European border or coast guard and no integrated defense, which Britain ensured would never happen.

No government should tolerate this kind of behavior, as it is a hostile action against the state, holding the population hostage. It should be treated as a form of criminal extortion or terrorism.

lol ... let me get this straight, the UK is a terrorist state because the EU doesn't defend its southern border?

It was President Juncker who said he thought borders were the worst invention of politicians ever, not the Brits who we learned recently are rather fond of borders. Your argument is backwards.

You have Juncker backwards. He was saying internal EU borders are a bad idea.

Rejecting all borders is a tenable ethical claim - indeed it's hard to justify why states should exist in most ethical frameworks that value human equality - but Juncker didn't go there.

But yes, Britain sabotaged the EU, including its having a joined-up defense and border strategy. Indeed, you might expect the departure of the most Eurosceptic nation to strengthen the EU.

You didn't read his comment. His statement was unequivocal and didn't talk about EU internal borders specifically: it was a statement of principle.

But hey, if you want to believe these people think differently to how they actually do, go ahead and believe that.