About an hour in to the mission I discovered that Nazis are actually kinda dumb and you don't really have to be very careful at medium difficulty.
Also, i don't understand why there are non-lethal options in this game, but I suspect there may be liberalism afoot.
I should note - If I did knock a Nazi out I specifically went back and shot them in the head. Those ten guys were accidents. Would have gotten them if I could.
We actually gave up on SE3 because we couldn't stand restarting the same mission again and again with all these crashes. SE5 is in great shape, now if they could have an interesting story and characters, that could even be better... I also don't get why they still keep on with WW2, they could make sniper game in another time period.