Unfortunately, there's a real professional risk in speaking out against this tide of censorship, so I won't say much. This is a great essay on the increasingly anti-controversy left: http://slatestarcodex.com/2014/04/22/right-is-the-new-left/
Edit to add: So the progression of political trends isn't linear. Liberals push for the next new idea and conservatives want to hang on to (or revive) some other value, but (hopefully) neither is going to endlessly push their agenda today until it's some authoritarian mockery of itself.