Do you remember the story of the Essenes? They were a Jewish group in Jesus day that decided to withdraw from Jerusalem and the life of Judaism. Their decision was driven by quest for purity in religious practice. They felt that everyone in society was living less than what God desired, and so they formed the community of Qumran. They had a restrictive set of entrance requirements, and if anyone failed to live up to the standards, they were asked to leave.

Reconstruction of the Qumran settlement UCLA Virtual Qumran Visualization Project
Since their Jewish neighbors had made so many compromises to the Romans, they felt the need to withdraw from society in protest. Only by living apart from the world could they stand for truth. They fully expected that God would honor them for being faithful They would care about truth even if the entire world adopted Greek and Roman lifestyle
No Jewish group in Jesus day had a greater fortress mentality than the Essenes, but they were a people of paradox. Note this observation by Luke Timothy Johnson:
The most paradoxical example of Hellenistic influence in Palestinian Judaism is perhaps the Qumran community. No Jewish group was more deeply dedicated to the Hebrew text of scripture and to the use of classical Hebrew in its modes of scriptural interpretation and in its composition of new sectarian literature.
To confirm this fact, simply look at the cave findings that we have for Qumran. Their documents and Scriptures (also known as the Dead Sea Scrolls) show us a people who loved the Book, loved their Hebrew, and invented creative ways of marking themselves from the world around them. Johnson continues:
Nor was any Jewish group more emphatic in its rejection not only of the despised Gentiles, but also of any Jews who associated in the slightest manner with Gentiles. No Jewish sect could, on the surface, appear more straightforwardly anti-Hellenistic. Yet, Qumran’s system of probation and excommunication, and its way of life organized around an absolute community of possessions, appear to owe more to Greek utopian models than to any precedent found in Torah.
– Among the Gentiles: Greco-Roman Religion and Christianity (Yale University Press, 2009): 30.
Let that sink in. The Essenes were an anti-Hellenistic movement. They hated the compromise of everyone around them. They wanted to stand out, but their entire fortress mentality was under-girded by the culture they were bent on rejecting. They unwittingly used the very culture that they hated as the basis for their fortress mentality.
Here’s the point — Objects in Mirror Are Closer Than They Appear.
We can live our lives complaining against the vices of American society, and yet drink deeply from American society. It easy to point a finger at THEM– whoever THEM happens to represent. We protest: “See how they dress, see how they talk, see how they choose to live! How worldly they are!”
We see others so clearly, yet see ourselves so poorly. A better question might be: How do I really look? How have I embraced the American dream? Does God have something to say about my life?
We might need a healthy dose of humility. None of us can stand apart from the culture in which we live. It is the air that we breathe.