Tory MEP Daniel Hannan (no, I've never heard of him either) has probably never heard of Godwin's law. The law relates to people who make reference to or resort to rather silly comparisons to Nazi Germany when debating something. It is also true that on Usenet and in other internet forums it is often mentioned by participants that the first person to mention Hitler or the Nazi's in an argument automatically loses what ever the argument is about.
If Mr Hannan had of heard of this law I doubt it would have stopped him making silly comments comparing the EU and some of its officials with Nazi Germany, unless Mr Hannan would care to divulge where the Hitler Youth meet these days in Brussels.
It is a shame that Euro sceptics cannot express themslves in a way that wins argument rather than making them look like ignorant bigots, such is the bile within some rightwingers when it comes to Europe. As a Euro sceptic myself I would prefer to see peopel argue where Europe is wrong from a positive angle using and sensible language which does not rely on the popularism in some quarters of xenophobia.