I am European and have lived in three of the countries you mention above (not Italy) and I think you are making a very broad and incorrect statement about what Europeans mean by Asian. In most places, Asian means primarily what it does in the US, that is the subgroup formed of Chinese, Japanese, Korean and Vietnamese (to some extent). In some places, the UK, but only in more formal conversation, Asian is considered to include people from the Indian sub-continent and greater South-East Asia, but even there the term Asian is rarely taken to include the Middle East. Germans do not refer to Turks as "Asians", but mainly as Turks. Even the geographical separation between Asia and Europe is widely contested, especially around Turkey.

And no Frenchman that I know would refer to Tunisians, Algerians or Moroccans as "Asian". All three of those countries are in Africa (and the term "African" is indeed used).

The only major mistake made by most Europeans that I have noticed is the tendency to refer to all Muslims as Arabs.

This is not really accurate. The PM of the UK is NOT the same as the Leader of the House of Commons (the lower house of Parliament). That particular person right now is Chris Grayling. While it is true that on several occasions, the Leader of the House of Commons and the Prime Minister were the same person, the two offices are completely different (and the last person to do that was Neville Chamberlain). The Leader of the House of Commons is more of a administrative role for the house itself (sort of a Secretary of the House).

The PM is the head of government and the most powerful person in the UK (de jure at least). The role of head of the executive in the US is assigned to the President. However, the role of head of state in the US is ALSO assigned to the President. In the UK, the Queen is the head of state. So the only possible analogy here would be for the President of the US to renounce his legislative rights to another person but still remain President in name.

No one is saying the US is forcing anyone to sell oil in dollars. After all, we have a clear example of a country switching oil sales to the Euro with no major consequences.

I went to LHC on a visit (school field trip by all standards) just last week and there's quite a lot to see indeed. I would also recommend the detectors especially since they're probably the most important part of the whole experiment and they also include a visit of the actual LHC tunnel. The two sites I would recommend are those in Meyrin where the main campus is (their cafeteria is pretty decent as well) and where the ATLAS experiment is located. While it may be quite impressive to see it, ATLAS is unfortunately closed so besides tons of cable and the external muon chambers you won't get to see much of the inner workings. However, most of the conferences seem to be concentrated around the campus area. There's also the Microcosm exhibit which, while somewhat simple, will probably be entertaining if you don't have a lot of experience with physics (especially the experimental setups). However, you must go see the CMS experiment at the Cessy site just because it's still open (well, it was last Wednesday) so you get to see the actual interior of the detector. Also, I think CMS is simpler to understand just because it's got a simpler setup than ATLAS. Only problem is Cessy is somewhat far from the main campus (not to mention it's in another country), but they will probably have some shuttles (not the "space" type) around for this. If you still have time, ALICE is probably interesting as well and it's located at the Crozet site. But you should have your schedule full with the two main detectors.