The protesters are going to push too hard for the Chinese Government to be able to keep standing back, so eventually there will be a big crack-down where the lives of ordinary HK'ers will be made much worse because of the actions of a violent minority.
These protesters have already stopped the main thing they were initially protesting about - extradition to China which is now scrapped - yet they keep violently "protesting" rather than peacefully doing so, and eventually China will be forced to crackdown and THAT is what this small number of violent protesters really want, another Chinese "massacre" to shock the world rather than a peaceful resolution which is wanted by the majority.
OK, would you defend the protesters who are using violence against that regime?