Agreed. But if the police then go and bomb the kidnappers's family homes, it's the police who are responsible for all those dead families, not the kidnappers.
Ok, now imagine the kidnappers escape with the hostages, and hole up in their family homes. The family members will answer the phone and they insist they are totally 100% innocent: they haven’t seen their scumbag kidnapper uncle in years! The family sure doesn’t seem to be very cooperative in helping authorities apprehend their uncle though…
Are you suggesting that this then makes it ok to bomb the family home, killing women, children, unknowing neighbours, and the hostage together? And that it's entirely the kidnapper's fault when this happens?
If so, I certainly wouldn't want to meet the gods that approve of such a thing, if any existed.