One of my favorite internet apologists has a saying that people who don't have good arguments have to resort to bad tactics, and for many people that I've had conversations with (especially among the left, but also among the right) this has often been very, very true.
While I don't support BLM/M4BL (the hashtag, not the sentence), I do think that several valid points have come up. And even though I disagree on their conclusions and sometimes their methods, it has at least caused me to think critically about how I understand the situation and what should be done about it.
I hope that the future can continue to be a place where we don't think of ideas as either "safe" or "unsafe". Any view we come across that challenges us can frighten/scare us away. Maybe it causes us to change our views, maybe it doesn't, but the introspection is valuable. I feel that's what a lot of people who want to silence debate are missing. Perhaps they don't want the introspection. Maybe they just want an echo chamber.
Regardless, let's fight for a world where ideas aren't crimes, and that people are strong/wise enough to debate and engage them in a way that makes everyone better.
"An open mind is like a fortress with its gates left unguarded".
Thing of it is, there ARE safe and unsafe ideas (or, more commonly, safe and unsafe presentation of ideas). And it's critical thinking skills that render you capable of safely handling unsafe ideas / presentations.
You're right that the introspection is valuable, and that encountering "unsafe" ideas should lead to it; so I'm going to suggest: it's a person's attitude towards introspection that realizes the risk posed by an idea.
> who want to silence debate
IMO these people are just very badly communicating the idea "stop talking about other people's lives, and have those people speak instead" (plus layers of baggage and trauma). Halle Berry's recent controversy over a trans role is a good example of this; people talked about how she should't play the role (and some other issues), what they meant was "someone who lived this story should tell this story".
> people are strong/wise enough
Yes. Do you support massively more funding for education? Or do you see something else as a means to fight for this?