First off, I think we should contextualize what happened - according to some news sources, the bombs were supposed to go off in the first days of an Israeli attack that would probably start an all out war (Some Hezbollah operatives became suspicious). The operation wasn’t intended to create an “escalation where Hezbollah will answer”, rather opening a full out attack against Hezbollah to force them to stop firing missiles at Israeli civilians and abide by the UN resolution.

Israel didn’t send “thousands of bombs God knows where they land”. They planted bombs in hardware that is used exclusively by Hezbollah operatives and their accomplices to evade gathering sigint. Yes, civilians got hurt. That’s the nature of war, and what makes it so horrible - people who might hold no malice nor pose any threat to the other side get hurt and die. The modern rules of warfare aren’t designed to eliminate civilian casualties, rather mainly to deter the warring parties from using civilians as a tool of war. That’s why an army can’t hide behind civilian population, but given an army that’s hiding behind civilian population, it’s acceptable for the other army to fire at them as long as they take proper measures to minimize civilian casualties (this in meant only as an example, not directly relating to Hezbollah or Hamas). If any act that results in civilian casualties is not “proper defense” I don’t think there has been a single case of “proper defense” in large scale armed conflict in modern history. People in the west might not realize it because for the last decades wars are fought away form their boarders, so it’s easier to view civilian casualties as optional.

And you know what? I’d WISH all civilian casualties in war would be confined to people who are in direct proximity to enemy personnel. If I could press a button and replace all Hezbollah attacks against civilian targets with bombs sent to IDF personnel, I’d do so in a heartbeat.

Regarding Netanyahu - right now, he’s slowly climbing in the polls. His plan is to keep his coalition from falling apart till the next election. Anything that disturbs the current situation is not in his interests (and, on the whole, the last time Netanyahu was proactive in anything other than a political capacity was about 2 decades ago). If Netanyahu wanted a war, he would have the public’s support for it months ago (in fact, the public very much supports a large scale conflict in order to stop Hezbollah targeting Israeli cities). His hand is being forced by other parties in the coalition. The obvious “culprit” are the far-right parties, but I personally think the main catalyst are the ultra-orthodox parties. This gets a bit complicated, but bear with me: The ultra-orthodox parties need to pass a law that’ll exempt their constituents from military service (long story short - they were exempt for years but due to court rulings, need a new law to keep that privilege). Galant (the minister of defense) is the one stopping the law from passing. Netanyahu was about to replace him and sell it to the public as Galant being the one who was against a war against Hezbollah. Actually, I’ll go as far as saying Israel being forced to activate the bombs prematurely, thus stopping Galant from being fired, makes  a war a bit less likely (Though obviously other factors have also been put in play, so the government can’t just do a U turn).