It says nowhere how the police got injured (attacked by the protesters, tripped and fell, got a dose of their own pepper spray, accidentally struck by a college when they used force on protesters). It does not say if the paramedics were attacked or if the injuries were just accidents.
It also says nowhere that any police vehicles were torched, just that some police vehicles were somehow damaged.
If I recall correctly (well, this is from 2011), the majority of injured police was not at the hands of protesters but accidents, exhaustion and "friendly fire" - but a very few police got attacked or were injured in brawls and suffered minor injuries - the paramedics were mistakenly pepper sprayed by the police, and the police vehicles mostly had accidents where they drove into ditches and such, but a one or two were e.g. scrapped or damaged by people throwing train track gravel at it.
Both injuries and damage (to police property), were aggravated by heavy rain and storm and the events taking place in rural areas and/or on gravel train tracks.
According to the police itself, most protesters were strictly peaceful and caused property damage to the train tracks at most ("Schottern").
So you got it mostly wrong, I'm afraid.
I do think it is extremely unreasonable and actually harmful to democracy for the police to track lawful, non-violent peaceful protesters exercising their basic rights (Grundgesetz) of free speech and freedom of assembly, or sanction or discourage them otherwise. This does not include violent people or people breaking the laws by e.g. willfully causing property damage, of course.
I also think it's very wrong to sanction people who you claim to be racist. If they are found to be unlawfully racist by an actual court, or demonstratively found to spread racist garbage as a teacher at a school, then again, that's a different matter.