Let's look at the implications of such thinking.
First, what people need to understand is that this liberal precept is one of the primary reasons that there is so much hated for America emanating from campuses. Some of the manifestations that we often see on campus is the perpetual idolization of diversity and the need to be completely accepting as valid--to the point of literal relativism--of all viewpoints and philosophies. Let me also clarify that I don't mean that someone doesn't have the right to their viewpoint or cultural background--that's not what I mean. I mean the push for diversity is unfortunately rooted in the common belief that all cultures and views are equally right or good. This way of thinking conflicts with my core values because 1, I believe, regardless of one's rights, there is still absolute right and wrong--in other words, we have the right to be wrong--2, I do believe that America is a superpower because the values it holds are superior to other parts and countries of the world.
*liberal readers gasp in abject horror at this point*
Recommended reading on this topic is the book by Dinesh D'Souza, What's So Great About America. Before you judge the book by the title let me say yes, it is written in support of western values, but it is hardly a book of right-wing dogma. Mr. D'Souza is an Indian immigrant who has a very balanced perspective. He doesn't pull any punches in his analysis; both liberals and conservatives will find reason to squirm under his sharp, objective insight. This is a really-easy-to-read book of philosophy!
Mr. D'Souza points out that the belief that all cultures are equal is the necessary thought process that produces the dogmatic faith: that America became so powerful and influential through coercion and oppression alone. You see, if each culture is equally meritorious, there can be no getting ahead of the others without coercion--and so thinks the liberal professor. The notion that we might have earned this wealth through a superior way of life and faith is dismissed as absurd and even bigoted.
In conclusion, another spin-off of our status in the world is (duh) we are much envied by both common people of other nations and also--in a more deceitful way--the governments of our rivals. Case in point: I don't think (this is speculation as well as experience) that the average foreigner desires to emulate a Frenchman for style. On the contrary, it is the American style and way of life that is desired and sought after. One of D'Souza's points is that a liberal professor would see a this desire, give a puzzled grunt and tell him he is mistaken to desire it, because, after all, his own culture of dime-a-day wages, contaminated water, and corrupt government is just as intrinsically good as America. I can just imagine the confusion on this hypothetical foreigner's face.
Read D'Souza's book for what it's worth and appreciate what we have for a change.
Cross-posted at Western Washington Unraveled