IMO, political correctness passed the point of being a powerful, necessary and useful tool of human rights advocacy long ago and has become more and more a tool used to oppress opinion, dissent and debate. It is, JMO again, antithetical to free speech. When people lose their ability to sense irony, to see the importance of humour in our culture (and, I believe, our culture is worth defending), to be able to defend positions with logic and instead resort to shutting down argument with PC limitations, they become unable to discern the truth of what is happening under their noses.
If warning signs predictive of trouble or danger concerning this case (and undoubtedly many others), as mentioned in the article linked below and others, were ignored because there was a perception of a potential PC backlash to observations of such behaviour, and, as a result, a danger to the observer's professional and social well being, then political correctness must be examined. Political correctness has, it seems, become a shield behind which cultural values--like freedom of speech--have been attacked. Political correctness, in its current form, seems to have become a liability.
http://losangeles.cbslocal.com/2015...ch-redlands-home-tied-to-suspect-syed-farook/