By: Addison Wylie An onslaught of revolting violence is on display in Killers.  It’s the kind of stuff that makes you nauseous, wondering how the filmmakers choreographed such hard-hitting nastiness.  The bloodshed, however, has a purpose and contributes to the cunning study of obsession Killers also displays. This Indonesian hybrid of a thriller and a horror looks at the digital age’s fascination with snuff and the power of control.  The story, written by Takuji Ushiyama…