Maybe It's A Generational Thing (Probably OT)
Having family and friends that have served in Vietnam, Korea and WWII on top of Libya, Kosovo, Afghanistan, and Iraq (both wars), I'm totally shocked at the hesitation shown by the US military, much less the UK Government. As the US Sec. of State representative (Julia something?) said, it's a pretty simple calculation for allowable collateral damage. This is even why so much of our airstrike technology has improved over the decades!
Look back throughout the history of the most recent conflicts and wars and look at how we have managed to reduce the collateral damage. Yes, I know the movie showed what many of us say is morally abhorrent. But look from it from the other side.
When, not if, those vests went off the casualty count and eve the collateral damage would have been much, much higher than what was shown. I think we all have seen the damage that IED and IED vests can cause. That's why it's called terrorism!
But then again, maybe it's because I'm old enough and have seen enough horrors to recognize that there is always a civilian cost during war times. This has been true since Biblical times and before.
Simply put, in times of war or times of peace one always has to be willing to accept the "Butcher's Bill." If you're not, then you end up being sold to the Butcher by the other side.
PS The movie was superbly done. The writing, directing, acting was all top notch. If it wasn't then there wouldn't be so many stirred up feelings and emotions regarding this film.