So just kill everybody with a weapon who looks like he might be a bad guy? Sorry bro that's what I'm talking about. And that is how you start wars. You know I love you man but I disagree with killing people that aren't actively trying to kill me.In a war zone with typical ROE's, the enemy is the enemy. If a Sniper spots someone that is confirmed to be the enemy, you engage (if that's the mission for the day). He has chosen a side and it's time for him to reap the consequences.
That's part of the job of being a Sniper, but not everyone can hack it. It's basically a preemptive strike. Waiting for a confirmed enemy to engage before you engage him is exactly how you get comrades killed and wars lost.