It is tough to show both sides of the same medallion, but the movie tries to do just that. It's true that there is a predictability to it, but the characters portrayed by really good french actors give it their best and the movie is worth watching. It is of course handled as mixture drama/thriller to attract a bigger audience, but that does not have to be a bad thing.
I personally liked the Grey area kind of handling/treatment the story received, but I can see why some felt it wasn't rooting for one side or didn't engage the viewer with more involvement in the story. But the characters all act naturally and upon their instinct(s). Of course some things are convenient and to get more information on the background you might need to do further research (and/or look at the deleted scenes of the movie), but that is true of many "historical" (or "based on") movies!
I personally liked the Grey area kind of handling/treatment the story received, but I can see why some felt it wasn't rooting for one side or didn't engage the viewer with more involvement in the story. But the characters all act naturally and upon their instinct(s). Of course some things are convenient and to get more information on the background you might need to do further research (and/or look at the deleted scenes of the movie), but that is true of many "historical" (or "based on") movies!