Actually i don't wanna give much comment, you all should have realized most of the shooting case, kidnap case, and disturbance case is mostly happened in restricted area and not much in wider area just like decade ago. TNI POLRI pretty much had secured much of the hinterland and outland area, in which before the massive infrastructure building is quite lawless and under the criminal occupation ( before they even can hit Freeport mining area and ambush the worker there, that's why Freeport using armored bus and cabs for their worker mobility there in some dangerous area). With infrastructure push, TNI POLRI had building many outpost and doing routine patrol.
This Attack started from the armed criminal burn down mess camp of PT Unggul, one of infrastructure contractor tasked to build bridge and roads around the area. This act prompt the authority forces to going to secure the area and from around the mess infrastructure (hiding in the intact building) some of the Armed criminal doing ambush, and the rest happened. There is almost no other way to push them into extinction' beside infrastructure push and put more troops (Police and army) into their area and secured them by building military outpost, doing routine patrol, "secure" the villager ( you know what i mean) than put more population into the area and build effective government and civillian institution there for long term prospect.