They meant this as a complaint about the United States. It should be taken as a compliment and a guide to action. This vision of world domination goes way beyond hubris, crossing the border into outright megalomania. It reminds me of all those terrible science-fiction movies, where the goal of the mad scientist or the evil space beings is always to conquer the world. For the authors of this manifesto of empire, however, what most normal people would consider villainous is, instead, virtuous.
Neoconservatism is an ideology that has to have perpetual war.
Some, like Kristol and Kagan, want the United States to assume a frankly imperial stance, acting unilaterally to achieve global dominance. Both see the emergence of a global state, centered in the West, as inevitable and desirable. The only argument is over how to bring this about. Suffice it to say that we are talking about two versions of essentially the same poison. It is very clever how they have gone about their deliberate campaign to marginalize any and all opposition to the globalist idea.