I can't see any connection between Americanism and Anti-americanism.
That's because you aren't looking. 
Please don't make muttonhead posts without having read the articles.
Please don't ask muttonhead questions? :tongue:
But, the question is still, what is Americanism?
Americanism is:
- loyalty to the USA and its institutions
- an expression that is characteristic of English as spoken by Americans
- a custom that is peculiar to the United States or its citizens.
wordnet.princeton.edu/perl/webwn
The terrorist attacks of 11 September 2001, however, sharply punctuated the end of the American century. Indeed, the era we are now entering may well come to be recalled as the anti-American century. The rise of anti-Americanism around the globe is a distinctive feature of the postSeptember 11 world. The expressions of anti-Americanism vary from acts of terrorism against American citizens or property to dramatic
increases in the global publics negative attitudes toward the United States and its policies, as registered in the latest global polls conducted by the Pew Research Center.1 Burning American flags, boycotting American commercial products, and mobilizing electoral support through unrestrained anti-American rhetoric are common in many parts of the world. Today there are two basic types of anti-Americanism: murderous anti-Americanism and anti-Americanism lite. The first is the anti-Americanism of fanatical terrorists who hate the United States, its power, its values, and its policiesand who are willing to kill and to die in order to harm it. The second is the anti-Americanism of those who take to the streets and the media to campaign against America but who do not seek its destruction. The first kind can be dealt with only by hard power. The second kind, however, must be better understood in order to devise effective strategies to counter it.
