I believe that user is talking about this post (link to article). They are requesting some evidence or research that supports the contrary claim you are making.

Specifically the peaceful ones. You said they don't work that it requires violence.

I had a bit of a brain fart and hit wrong button posting before I had fully written. That's on me not on you.

And yes protesting isn't going to change policy directly. Only new policy will change policy. But protests often leads to new policy.

They're going to look for every reason to discount and disregard protests however. Specifically highlighting any small instances of violence. And specifically because it can change policy eventually.