In the middle of the twentieth century the US Army was crammed to the gills with anti-Semitism and belief in a "Jewish world conspiracy." And I read somewhere that Israel is actually labeled a "non-traditional adversary" by the State Department because of traditional Jewish messianic beliefs.
I was in Greece ten years ago, and I think that most Americans misunderstand Greeks.
Greece was the country that fought the Nazis and communists longer and harder than any other country in Europe -- only to get sold out by the US to their lifelong enemies, the Turks, not 20 years later. Greeks love the idea and ideals of America, but not what the American government has become and has done to them -- and I don't blame them. Greeks are a tough independent people who don't suffer fools lightly. When the 1999 NATO bombing started, Greeks took to the streets in protest. Then Madeline Albright, who knew that the Greek economy was almost solely dependent on tourism, threatened Greece with a State Dept Travel Warning to make them shut up. It worked, but the Greeks retaliated in their own way -- they turned around all the signs that led North toward Albania and Kosovo, back toward Athens to screw up the NATO visitors.
The difference between Greeks and Muslims, is when Greeks (or Serbs) don't like you they don't mass murder American civilians. Unfortunately, in the current atmosphere of American politics, that does not work in their favor.