Excellent analysis by Hannan - as usual. Too bad he's talking to a brick wall ...
He is reaching more and more people in Europe, many people outside of the district he represents follow his speeches and support his advocacy.
In a way he is doing the same thing as Ron Paul did in the USA, he is spreading a message based on philosophic grounds waking up people in the process.
He may not have much grounding in the parliament, but he is one of the few MEP's who actually has a following and is fairly well known across the EU. I don't know about the election of MEP's in most nation states but in the Netherlands, where I get to vote, we vote on a party and have no direct influence over which person is on top of the list. This may be arranged differently throughout the EU, however interest in MEP's and the parliament is at least 10 times lower than the general interest of Americans in the congress.
The main problem with multinational states is socialism, before the EURO currency there was already an agreement on open borders called 'Schengen' (since 1985) which allowed for the free movement of people (and goods) over the borders of states that signed. In effect this meant that anyone could drive over the border without any kind of passport check of visa requirement. This in itself has been good for the economy, which nobody in Europe will try to deny for as far as I'm aware. The main problems that present themselves in western Europe are the (extremely) high taxes in cooperation with a well established welfare state which discourages citizens from taking the so called 'minimum wage' jobs. The effect is that immigrants will do those jobs, and the welfare state has to cope with higher unemployment. Higher unemployment means more benefits putting more stress on the taxpayer and thus increasing the deficit.
People will find out they were wrong all that time, sooner or later. A more interesting question is, how bad does it have to get before people will finally agree ? Right now it's really bad in some places, but only very locally. Generally around where I live jobs are pretty scarce, but nobody is living on the streets, people still drive new cars and go out for dinner. I would expect that things in Europe gradually decline, I can see how my taxes and expenses are generally going up by more than the stated inflation but nothing massive just yet.