Earlier quoted context omitted.
I believe quite clear that they can stage peaceful protests. Peaceful protests have never been prevented in Hongkong.
Perhaps you are unaware, China has produced videos of military units gathering near the border of HK. China is making very visible threats to peace. edit next reply below.. "Let's not pretend" - are you copying my language from another comment? weird or a coincidence. Anyway we don't see eye to eye on this. In my view, Beijing's obstinance is causing all kinds of trouble in HK, for both the HK police and the general…
Let's not pretend that what has been happening are just peaceful protests: There has also been violence, ransacking of the LegCo, and blockade of the airport. Any of which would not have been accepted anywhere.
Protesters have won on the extradition bill. It's effectively gone. Now they have just made sure that the mainland's public opinion rally against them and behind the central government. That has been a strategic mistake, IMHO.