Caesar.: I will bite. The "referendum" has ben ruled illegal by every single court up to the Constitutional Court, but the regional government has decided to hold it anyway after repeated warnings from judges that it was illegal. So the police are doing their job, and according to the videos I've seen on TV (on different news channels), with the exact proportioned means you would expect in this situation.
That article tells only one side of the story: the side from the nationalistists' propaganda, which would make "1984" proud. They will call any kind of police intervention "excessive force against peaceful protestors". I would like to encourage everybody interested in these news to look for both sides, not just one.
Well, I didn't read the article, but they all look pretty peaceful to me with hands up, of various age, unarmed, not physically strong, unmasked, not resisting... while being shot, beaten, rammed, dragged by hair, headstomped, thrown, kicked, pushed?
They don't look like nationalists to me.. Nationalist is someone, who has country ideology literally above everything. Just voting or expressing preference to different flag, does not make one nationalist. But those who commit violence to "protect dignity of flag" - those are nationalists...
Guess, if this is not excessive in your eyes, its because they are not using live ammunition?