"There is no mine or yours, everything goes in the common kitchen." - a fanatical peasant who believes in the Socialist fairy tale
Everything goes into Tito's pocket, and the remaining leftovers can be eaten by the people rabble. But very few of these ignorant villagers knew that at the time, many of whom even to this day fall for all possible manner of populist tactics utilized by corrupt politicians and criminals, while voting almost exclusively for these extremist parties in which it is very difficult to tell who's a gangster-turned-politician and whose a politician-turned-gangster. (Not that it matters much...) When will we finally abolish the right to vote for people incapable of making rational decisions? How is it that my vote counts the same as that of a clueless peasant who can barely count to 15.
War movies are all really just sports events, like football matches: you choose one side and passionately support them, and that's why you're not bored. But what's one to do when you have no one to cheer for? What if you have two evil sides at war against each other? Most people don't understand the very simple and obvious fact that there are conflicts in which both sides are evil, and that happened on several fronts in WW2, specifically between the Commies and the Nazis who were one and the same trash, two sides of the same thieving/genocidal coin. Most people want to believe that there are no such wars, and that's why the vast majority of people choose one side, and then forced themselves to keep believing that they'd chosen the right one.
I have no one to root for in this kind of desperately stupid Partisans-my-heroes turkey, hence this kind of propaganda fairy tale can only be boring. Very boring. I can't root for the Nazis, obviously. But I can't root for the "liberating" Partisans either - violent Commies who destroyed Serbia with one vicious blow, for all times. The drastic consequences of the communist "liberation" are still felt today. Serbia simply cannot recover from 40 years of communist lies and decadence, because in the meantime the people had become infantile and zombified. The critical point has been passed a long time ago, so there is no return to even a semblance of progression. Devolution as a road to the abyss.
"Kozara" is indeed a notoriously daft red fantasy. Anything that is even remotely realistic is totally crushed by one-dimensional, excessively idealistic characterization and a total distortion of historical events. Pathos rules the film, as well as various Hollywood clichés that are more reminiscent of 40s films than something from the 60s. The night scenes are too dark, practically useless; they could have sold these scenes on LPs or cassettes instead, for audiences to listen to these battles because the movie certainly doesn't give you more than the audio. But I suppose it's cheaper that way too: no need for expensive effects and elaborate set-ups by the director.