Action with questions

Rating: 7/10 (1 May 2018)

A group of 12 US soldiers is sent to Afghanistan to help an Afghan warlord strike a decisive blow against the Taliban.
This true but previously classified tale of US seeking to weaken Al Quaeda's power base after 9/11 has Chris Hemsworth and Michael Shannon as the senior members of the squad (Michael Pena is the only other member I have ever seen) and the excellent Navid Negahban as General Dostum.
The two main elements of the movie are the uneasy development of the relationship between Hemsworth's character and the general (we are told that Dostum is now Vice-President and that the friendship between the two men has continued) and action.
I'm in two minds about the action. It is well staged and exciting, but I sometimes felt I was watching a western from the 40s or 50s when the 7th Cavalry storms an Indian village and wipes out every one of those pesky redskin varmints. The ease with which hundreds of anonymous Taliban black-clad spear-carriers are mown down by the goodies pays little heed to the fact that, irrespective of how abhorrent you find their beliefs and activities, these were human beings, many of them possibly pressganged into service against their will.
I was entertained, but felt uneasy about it.