Like the other atrocities these ppl do, the west will not give a fuck and nothing will be done about it just like massacres in Africa. Except the Americans where in the middle east and fucked things up and then left.
For the next 10 years we will hear same things from that region. It conveniences the west that these guys are de-stabalizing that region.
1 makes everyone think "this is Islam", another news headline
2 keep the region in the stone age
3 other ulterior motives, possible get Syria
The west has proven they're not genuinely interested in wiping them out. Just keep them in that area, the moment they start becoming a threat to places that have US bases like Turkey and so on, only then do you see some interest. Human lives matter none, killing their own is all good and all according to keikkaku.