In postmodernism the intellect is replaced by will, reason by emotion, and morality by relativism. Reality is nothing more than a social construct; truth equals power. Your identity comes from a group. Postmodernism is characterized by fragmentation, indeterminacy, and a distrust of all universalizing (worldviews) and power structures (the establishment). It is a worldview that denies all worldviews (“stories”). In a nutshell, postmodernism says there are no universal truths valid for all people. Instead, individuals are locked into the limited perspective of their own race, gender or ethnic group. It is Nietzsche in full bloom.
Although postmodernists tend to reject traditional morality, they can still be very moralistic. They will defend their “rights” to do what they want with puritanical zeal. Furthermore, they seem to feel that they have a right not to be criticized for what they are doing. They want not only license but approval. Thus tolerance becomes the cardinal virtue. Under the postmodernist way of thinking, the principle of cultural diversity means that every like-minded group constitutes a culture that must be considered as good as any other culture. The postmodernist sins are being judgmental, being narrow-minded, thinking that you have the only truth, and trying to enforce your values on anyone else. Those who question the postmodernist dogma that “there are no absolutes” are excluded from the canons of tolerance. The only wrong idea is to believe in truth; the only sin is to believe in sin.
(Source: Gene Edward Veith, Jr Postmodern Times, pg. 195-196)