I think you're right that a lot of par for the course friction between groups is being cherry-picked and made to look like a broad trend, when it isn't nearly so broad if it is anything.
There's a lot of cherry picking, and a lot of making up out of whole cloth.
An example of the latter: http://therealtruthproject.blogspot.com/2014/07/myths-about-saul-alinsky-and-obama.html with an addendum: http://therealtruthproject.blogspot.com/2014/08/what-did-saul-alinsky-really-say.html
Note that the mythical "8 levels" were so well established, in a way, that Yahoo is even now, spitting it out matter of factly, 3 months after I wrote my piece. I just tried it (entering: What are the 8 levels of control as outlined by Saul Alinsky?) to answers.yahoo.com
And yet, I warrant very few people have any idea that it's going around, unless they spend quite a bit of time on right wing web sites -- and read the comments, because the site's main author(s) -- at least on the more important blogs, won't be caught telling such flat-out lies.
Since many LRers are fairly recent college graduates, it seems worthwhile to ask to what extent would people here agree with reports of rampant irrationalism such as this one: http://www.city-journal.org/2014/24_4_racial-microaggression.html from a right-leaning journalist known for her book The Burden of Bad Ideas (which I'm certainly not promoting).
Some other sources like Massimo Pigliucci (see http://scientiasalon.wordpress.com/) who seem more alarmed by creationism or the idea that all climatology is one big conspiracy, are also quite bothered by extreme relativism in some camps of epistemology, and sociologists of technology and science.
To what extent, if any, do you think PC suppresses free speech or thinking? While sociology and epistemological branches of philosophy have partisans who to me seem to advocate various kinds of muddled thinking (while others are doing admirable work), in your experience, is that the trend that is "taking over"?
To what extent if any do you think any of that is leaking into more practical or scientific fields? If you've taken economics courses, where do you think they rank on a left to right spectrum?
Also, have you observed much in the way of push-back from conservative and/or libertarian sources endowing chairs or building counter-establishments like the Mercatus Center at George Mason University? And I wonder the same about any movement strictly concerned with rationality, empiricism, or just clear thinking.
My mind is open on this -- so open that it's painful to be around all the hot tempers that it can stir up.
Thanks, Hal