Dark, intense , a movie which means different things to different people.
There is a communist/socialist things to everything, which views violence as an reaction to poverty/inequality.
Shiv bhakts may see it as manifestation of shiva and rudra in one man, with later being ugly manifestation of all that's dark.
Psychologists may read differently.
Oppressed/abused and violent people may find themselves vindicated, as to society, and not they, being the root of all evil.
Good gripping movie, slow at starts, but as first murder rolls in, it gets racy.