With that first paragraph, at least, I get where they're coming from but I feel like it's likely that they've never actually killed somebody. Yes, it's morally acceptable and good to kill Nazis, and also taking a life is a thing that sticks with you in ways you don't expect (from what I've heard; I've never killed anybody either). I just feel like that's a weird thing to criticize the film for. I really doubt anybody goes away from Come And See believing that killing Nazis is wrong or bad, just that war is hell.

I could be totally off-base here; I haven't see the film in a long time. But that criticism just strikes me as not really warranted