There is an excellent piece over at Dr. Sanity’s titled The Four Pillars of the Socialist Revival and the Rise of Islamofascim.  A sample:

Multiculturalism and political correctness are two of the fundamental pseudo-intellectual, quasi-religious tenets– along with a third: radical environmentalism–that have been widely disseminated by intellectuals unable to abandon socialism even after its crushing failures in the 20th century. These tenets have been slowly, but relentlessly absorbed at all levels of Western culture in the last decade or so–but primarily since the end of the Cold War.

All three have been incorporated into most K-12 curricula and all other learning environments. They have been at the forefront of attempts by leading academics and academic institutions to rewrite most of history and undo thousands of years of Western cultural advancement. And further, as the culture has been completely saturated with this toxic brew, any attempt to question the tenets’ validity or to contest their value is met with hysterical accusations of racism, sexism, homophobia, Islamophobia, imperialism, bigotry, or–worse of all –intolerance or insensitivity.

It just so happens, that these tenets represent three of the four pillars that are the foundation of an evolving epistemological, ethical and political strategy that the socialist remnants in the world have developed and are using to prevent their ideology from entering the dustbin of history.

Great stuff, and well worth reading.  Also take a look at this chart, which she adapted from Stephen Hicks book Explaining Postmodernism.

Conservatives have stopped trying to win the underlying philosophical argument between statism and liberty,  completely ignoring the irrational metaphysics of our opponents. The progressives believe, quite literally, that there is no objective reality, that history has no lessons for the present (because with no real world, no real history), and that language is something to be manipulated in the pursuit of power. We ignore these beliefs to our disadvantage, for the modern progressive movement falls apart with even the smallest examination through reason.  

Dr. Sanity recognizes the philosophical threat and speaks to it well.