I won't advocate the destruction of ant colonies in forests because for ecological reasons, not because of individual ant suffering.
Video footage released from the drone/missile strikes are already being used for entertainment purposes. When I go onto reddit for videos titled "Hellfire missile blows up terrorist". I'm actually enjoying a video of a man being blown up by a Hellfire missile.
I don't think motivations factor into it at all. A death is a death. At the risk of invoking Freduian psycholoanalysis, it's your cognitive dissonance that making you feel one is more justified than the other.
> "I can't be the one killing animals, I'm a good person"