BUT.
en.wikipedia.org/wiki/Faurisson…
As a matter of principle, I think so: a well functioning society would be able to treat some ideas as outside the bounds of acceptable discussion.
As a matter of practice, I am deeply torn.
On the other hand I think it *is* very difficult to achieve this in practice, and that the attempt to do so carries a lot of real risks.
Now, what happens in practice is that appeals to MMP are treated as axiomatic: a claim of marginalization is put forward and then used to justify shutting down debate about it.
This is NOT to say that these claims of marginalization are always false (often, they are not), nor even that we shouldn't think it bad to debate the rights of those who are marginalized (often, I think it is).

