The only basis on which it ever can be possible to seek to justify actions that kill innocent people is that somehow these will reduce the harm done by the people you are directing those actions against.

That applies just as much to dropping bombs and carrying out "air strikes" as it does to planting bombs or firing rockets. It applies both to actions aimed at killing political opponents, or seeking to terrorise a civilian population into ceasing to support them.

That basis does not exist in this conflict. The only outcome of the killing is more killing in the future.