Police violence against protesters is usually limited to water cannons and tear gas, maybe rubber bullets. Protester violence is rare, sometimes throwing rocks, maybe Molotov cocktails and burning cars.

It’s the same in the US. The question is “How do you organize your protest such that the police won’t attempt to disperse/subdue you and give you a 5 year prison sentence?” The power the police (and the state in general) has is derived from their ability to commit violence without reprisal. That’s how it works in every country on Earth. The only meaningful way to deter them is to be organized in a way that says “We have protection. Fuck around and find out.”

I would assume the police would have the tools to fend off people using “mechanical weapons,” like bows, maces, spears, etc. They also have gas masks and the like to deal with chemical agents, like pepper spray. I’m not an advocate for using fire or explosives as a weapon, as they tend to cause too much collateral damage. So what else is there to be done than having a number of people carry around firearms, possibly loaded with less-than-lethal rounds (if they’re even legal), and hope that they won’t have to use them?

The reality of the situation, as far as I’m aware, is that the state has grown tired of people protesting. They’re sending out their goons to subdue people with violence (or the threat of violence) and ruin their lives with indefensibly-long prison sentences. Marching around completely defenseless while under this type of rule is pure folly.