Israel is defending itself against Hezbollah. Hezbollah started the current Israel-Hezbollah conflict on Oct 8, the day after the Hamas-led attack. They can end it at any time by merely stopping their bombardment of Israel, but they have indicated that they don't plan to stop until there's an end to the Gaza conflict, which they are not a party to. Of course self-defense sometimes involves preemptive strikes, like Ukraine striking Russian airfields.
We'll have to see how effective future demining efforts are, but historically, civilian casualties from unexploded mines have been quite significant. Despite the risks, Ukraine can't realistically stop inhabiting 20-30% of its territory indefinitely.
Where do you get 1:2 from? There isn't much credible information yet about civilian vs militant deaths. What we do know is that the 5,000 affected pagers were ordered by Hezbollah and issued to its members. Less is known about other devices.
