Murdering the surrendering soldiers in WaW was completely optional, but then some other soldier would do it. Also in the execution scene, you weren't playing the bad guy. It was a violent scene, yes, but not only it wasn't "playable" but you were also a victim. Same thing with the marine after the bomb blows up.
Your examples are terrible, lof.
So if it turns out the russian terrorist had his family massacred by US soldiers and is only taking revenge then it'll be all fine?