@bifouba
This is a slippery slope, as discussed.
It would, in my non-professional view, be cold-blooded 1st degree murder and quite likely constitute a war crime. For it to be considered "genocide," it would need to happen methodolically on a significantly massive scale. Otherwise, the "gens" part of the word would not be fulfilled.
The soldiers should be tried
Note:
I have not seen reports of this happening from reliable sources, so this was theoretically speaking.