I view it as a dialectic, in other words a pendulum swinging back and forth through long stretches of time, but gradually slowing. Hyper-sensitivity among the collective consciousness is a response to the Hypo-sensitivity that preceded it.
In time, maybe a few decades, the distaste for political correctness will probably lead to a society that's more tolerant of racially motivated ire, but to a lesser extent than the pre-Civil Rights America. And then a few decades from there, the pendulum will swing again to a lesser extreme than we see today.
Theoretically, it would all reach a happy medium, but odds are that some terrible crisis will through a wrench into the machine before that can happen.