Personal politics aside I am very wary of this level of 'drama as documentary'. The caveat at the start both protects and gives cart blanche to all levels of obfuscation, manipulation and fantasisation (something the film is at pains to highlight). The film is clearly biased in its representation of all involved and certainly leaves much out (neither side came out as innocents).
However to be honest the acting is solid and it does get the broad themes correct (though stylistically the cinematography is annoying).