IMO the reason you want to silence someone else's viewpoint is because you don't trust in the judgement of people who get exposed to that view to make the decisions that you want them to make. If you did trust in basic human nature you wouldn't worry about their judgement, you'd worry about them having enough info to make an informed decision per their own judgement.
Where did ignoring people like him get us so far?
The number of hate groups TRIPLED since these trolls took over.
The bigots received validation from Milo / Bannon / Trump and other fascist trolls who are currently fashionable.
the reason you want to silence someone else's viewpoint
Again. This is not just another viewpoint.
This is a fascist viewpoint that doesn't deserve to be debated.
When the starting premise of your point is that women and non-westerners are not deserving of equal treatment, where do you go from there?