(I strongly disagree with your take on Pinker and Murray! But that's neither here nor there as far as my argument goes.)
Imagine there are two college campuses. On campus A, when students disagree, the students in the majority say they felt unsafe, demand that the students in the minority be expelled, and on occasion succeed. On campus B, when students disagree, they... talk about the issue at hand with each other.
There is free speech on both campuses - after all, the government isn't involved here. Yet I think it's safe to say that orthodox thought (whatever it happens to be at the time of lock-in) is more secure at campus A than campus B. And I think it's reasonable to talk about the difference between the cultures, and advocate for one over the other.