In the past few years:
The fact that you even refer to things that occurred "in the past few years" is enough to conclude that what follows is seriously cherry-picked evidence. Any incident may obviously be concerning as far as it goes, but is there any real evidence that racial prejudice and animus are getting out of control? The point is, any situation where multiple cultures and social groups interact (and yes, races in the U.S. are social groups too, as we all know) is going to involve some amount of friction and conflict - particularly in a youthful environment, such as college. It's not something unrealistic or out of the ordinary. One can hope that such things will improve over time, but I'm not going to hold my breath for that.
I'm 62 and have seen a lot, but what falenas108 describes sounds kind of horrific to me. Also I don't see "cherry picking" in part because he/she's just giving a couple of points of data, not using a couple of points of data to draw broad conclusions. If you haven't looked at the link http://assets.feministing.com/wp-content/uploads/2014/11/Screen-Shot-2014-11-19-at-10.26.55-AM.png I suggest you do. It seems to me many people's fears and rages are being played on, and many people find themselves agreeable "echo chambers" where they ...
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