It's always difficult for police if protesters carry weapons.
Protesters wave their weapons to police and if Police feel their own lives are in danger, then they have to react.
It's easy - protesters should not be allowed to carry weapons, sticks etc.
If they do, then they should be willing to live with the consequences. Think back to the 2 security guards who where violently hacked to death - you only saw the police video and not that video.