The correct option is "more milgram"
Milgram's experiments showed that people are willing to cause harm to people (when ordered to do so) that they don't directly see, if they use techonology to cause this harm. We could explain this by saying that there is a certain sense of not directly causing harm then. In his experiment, when ordered, they did not hesitate to apply electric shocks to people in another room.
By extension, long-range missiles could make it easier for people to fire, since the victims would also not be visible, but rather far away