[StoneColdGOP]

Nations liberated by the U.S. in the last several decades or so, either by ejecting an occupying force or removing a tyrannical government.

Iraq
Afghanistan
Kuwait
South Korea
Japan
Germany
France
Italy
Norway
Philippines

Did I miss any (I think I did...)?

Did people in these countries other than Iraq respond to their liberation the way the Iraqis are?

[Republican Extremist]

During WW2

Belgium
Poland
Egypt
Libya

[XHogPilot]

Did people in these countries other than Iraq respond to their liberation the way the Iraqis are?

Please do not forget, signing of armistice agreements are not synonymous with peace. For example, Hostilities continued after "cease fire" agreements with both Germany and Japan. The US did not sign a peace treaty with Japan until Sep 8, 1951. In Germany, guerrilla NAZI activity continued for years. No formal post WWII peace treaty was ever signed with Germany, arguably, this occurred defacto with the establishment of NATO.
There are plenty of South Koreans who are none to happy with America's continued presence in their country.

"Liberated" enemies do not lose their fight overnight.