Yeah it's nitpicky but you really can't say you don't understand the complaint. Batman has been opposed to murder/not helping people for much longer than he's been ok with it. You can make the argument that Nolan's Batman is different and you're probably right in some respects, but it's a very fundamental aspect of who he is in pretty much every work of fiction involving him that almost literally every person is familiar with (except the Burton movie, but that's a whole different story too). Again, I can see why it bothers people, but honestly it doesn't affect my enjoyment of an amazing movie.
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