However it seems that many reactions show a kind of besieged attitude: GW, Islam, Federal government (especially since the election of B.H. Obama), diversity, even History look like a threat to America.

I think I see what you are getting at, and I agree that it is a sentiment shared by many in the U.S.  The reason?  It may be overblown at times, but it is ultimately rooted in a fear that evil is looming on the horizon.  Many Americans see the U.S. as the foremost "good" superpower, in contrast to past tyrannies that have repressed freedoms and basic rights such as Nazi Germany and the USSR, or China today.  The U.S. supports democracies and capitalism, which is a market system which allows individuals to make their own choices.  Basically, there is no other nation that is both "good" and capable as America, which is why I think Americans are fearful.  Eliminate America from the picture and it can become a global free-for-all in which freedoms are trampled on and decisions are made by the sword.

I can understand that feeling however are you alone to fight in Afghanistan, to deal with Iran, North Korea, Al Qaeda or any threat against freedom and democracy (Christianity included, check the last referendum in Switzerland) ?On the other hand America is not alone, fierce fights still occur but nothing new under the sun and these "struggles" are necessary for maintaining these ideals.

Agreed - within the struggles ideals are molded.  But I think that many Americans feel strongly attached to the ethos of the first Americans who were led by their own ideals and were victorious over a stronger opponent.  It forged the American soul of the patriot, a soul that is sure of its ideals and will strive for them, whether it is with the help of others on independently.  They feel that this patriot soul has helped them throughout the ages and win two world wars....and to stare down communism.Today, these same Americans feel that Europeans aren't very good allies.  Sure, they are generally on the same side of things, but they are often weak and hindered by emasculated policies.  They are also motivated by a level of envy in regard to American power, and so the American soul is skeptical of the general European motive.  The American soul guards its rights, its freedoms, and its national sovereignty.

Indeed, America did have serious help in gaining its independence.  What I have been describing to you, however, is the sentiment of the modern American who feels a strong sense of patriotism and today, a sense of being “under siege”.  Think about the people protesting outside at Copenhagen, advocating communism.  I have little doubt that if you asked them, you'd find that every single one of them has been greatly affected by capitalism for the better.  Yet that is not reflected in their sentiments.

I don't think that these Americans feel that allies should "obey, execute and shut up".  I don't think they feel that international cooperation isn't a good thing.  However, I think these Americans feel that if America is carrying the majority of the burden in terms of financial resources and security, it should have a greater say in things.  Because of America's power, she has more enemies, and therefore has to deal with problems that less powerful nations don't have to face.

I am trying to present an objective description of those Americans who give off the impression of an attitude of "America under siege".  I am trying to make it accurate in the few words I have written, but to sum up an entire culture in a few paragraphs is naturally incomplete.

I think one reason Americans feel they are “going it alone” is that the level of commitment of our supposed allies in Afghanistan and other regions is so low.  Certainly, there are forces from other countries in Afghanistan, but all of our allies forces are a drop in the bucket compared to American numbers.  Other factors are things like the Balkan Wars of the 90's, the perception is that it took Americans to go in and clean up the mess.  Of note in the Balkans is that the Dutch stood by as the Muslims were massacred in Srebenica because the UN ROE did not allow them to intervene.  There is a perception that the Europeans are more than content to let America shoulder the majority of the burden of maintaining the peace while they enjoy the benefits of said peace as well.Kagan puts it well in "Of Paradise and Power" when he says that the Europeans have enjoyed the Pax Americana and forsworn war because they had America to protect them.  America takes a Hobbesian position of international politics while the Europeans seek more multilateral, legalist solutions.  Essentially he says America uses the diplomacy and strategy of strength while Europe uses the diplomacy and strategy of weakness.  They can do that because of American strength.  I have to say that I tend to agree with him in some respects.

Just an opinion… little solid to base it on but Washington seemed to realize that we managed to get our freedom by playing those frequent controversies to our advantage, and needed to get our of the mix without becoming tied (politically) to any one country or block in Europe; rather to try to have commercial (albeit neutral) relationships with all but otherwise mind our own business.We had a bit of a problem with both our erstwhile friend, France, and our former adversary, the English... while that did eventually blow over and still later (post WWI) they both began to view us as, however grudgingly as, the ace-in-the-hole. We have thought of ourselves as the leveling influence and would like to think minding our own business will still work (at least until the bullets start to fly) but, sadly, the radical fundamentalists (all sides) don't go for that. Those folks will only allow their ideas and so even though we have sought to avoid implicating ourselves we are drawn into the mess.Add to the domesstic situation and Washington again looks brilliant for his admonition against political parties.