<<We're not talking about stuff like "I have a different perspective on who should be chief of our tribe". The kind of political rhetoric that will inspire future generations of enlightened intellectuals to say "I disagree with what you say but I will fight to the death for your right to say it".
I think we fundamentally disagree despite sharing the same initial assumptions.
My argument is effectively that EVERYTHING is a matter of perspective and therefore a matter of opinion and as such protected, because people will disagree about everything, but, if they are indeed enlightened, they will defend it as an opinion. Just by saying that some topics are off-limits, you squarely place yourself as the arbiter of truth, which is a tricky position to be in, because some ideas are just too dangerous to impressionable minds.
Here is the fun part. That is true. Ideas can absolutely wreak havoc, but the appropriate, albeit labor intensive, approach is to help people work through them and not try to suppress it or worse, force it into the shadows.
<< We're talking about content that has NEVER been acceptable to be preached in a public sphere.
I don't want to belabor the point, but there were tons of things that were not acceptable and now are acceptable precisely because some decided to challenge status quo of what is 'never acceptable'. If examples are needed, note how quickly question of homosexuality moved from barely whispered to openly celebrated in US society.