it's an observed reaction that troops on all sides of conflicts have had to certain enemy combatants that goes back over a century of warfare. snipers -and now tactical drone operators- are routinely killed on the spot when captured, sometimes being tortured first if they caused particular suffering to the unit that captured them. the psychological terror of being killed by someone that you can't see and can't fight back against instills a unique & deep hatred that seals their fate if ever captured. that's why i said "it is what it is".
United States