This idea of a 'debate' where opposing ideas are sincerely engaged with has pretty much always been a fantastical notion, which, as suggested earlier in the thread, is something the Right generally understand perfectly well.
This is the key point for me.
The media furore about no-platforming and safe spaces is largely just a diversionary tactic - the wider picture clearly shows that universities are becoming more exclusionary, and changing beyond all recognition into businesses by right-wing models. That's the real, large-scale threat to ideas and debate, not these media-led frenzies about a handful of debates at Goldsmiths or whatever. Same old 'PC gone mad' arguments recycled over and over.
Side point - the 'safe spaces are infantilising' argument doesn't wash in a society largely dedicated to the ongoing infantilisation of people by making them too scared to speak any kind of truth to anyone more powerful than them for fear of losing their job, house, liberty etc.