We have such a huge mental / moral block on the idea of using nukes, but we're willing to do a lot of other very horrible things to others. Things like cluster bombs, mines, poison gas, biological weapons, drones, etc.
Is there really anything about them that's bad? Or any worse than other things?
If you get rid of the "It's really bad to use nukes of any kind" implied rule, is it really surprising it's considered a reasonable strategy?