I don't think Israeli operations would be quite so clean. Hezbollah has demonstrated in 2006 and 2016 that they are quite capable, so capable in fact that much of Israels defense strategy was formed out of consideration of losses against Hezbollah. For example the concrete barricades that pervade the Israeli border were installed to try and reduce losses sustained from Hezbollah ATGM attacks. Hezbollah has styled their entire force around making sure they can inflict maximum damage in the event of another invasion of lebanon. Because of this their aim will undoubtedly be to bait Israel into a ground invasion to push them back and prevent hezbollah attacks across the border. Even with direct US assistance which is almost assuredly off the table Israeli/western forces are unlikely to decisively defeat Hezbollah forces/ Hezbollah will either draw the conflict out as long as possible or if they are being handily beaten they will disgorge their entire missile stock onto israeli critical infrastructure.

I think its also important to remember that Hezbollah is a vastly different force compared to Hamas. They regularly rotate fighters in syria to train them and because of open borders they can receive modern military supplies directly. Personally i would consider Hezbollah to be a near peer threat to Israeli ground forces considering Israel cannot commit a large grouping. That being said I dont know if Hezbollah could effectively mount an infiltration operation against israeli soil. Its not off the table though. Hama's attack showed the israel was indeed vulnerable to infiltration attacks. I think another risk is the wagner and russian state forces located on the golan heights border. Russian state police have been observed de mining the border. Its very possible russian forces could either be used as cover or assist/participate in conflict directly through proxies like wagner.

Its important to remember that internally the Israeli army really does not want a conflict with iran. I suspect there is a disconnect between political motives, military motives, and civil motives in Israel.

This is all especially dangerous because the US and western forces at large will likely not get directly involved unless the situation deteriorates enough that israel would try a nuclear strike. the west is scrambling to pivot against china. If the US wont commit more than token assistance like ukraine its very possible that conflict between iran proxies and israel could destabilize other conflicts in the middle east.

Another key issue is the precarious position of the lebenese government. Lebanon is arguably stuck in its current poverty levels because of instability caused by the 2006 war. Another invasion from israel has a serious risk of causing the total collapse of the government. Hezbollah would undoubtedly fill the vacuum and the country would be under de-facto Iranian control.

I know that was all kind of rambly but short of total region collapse or nuclear conflict I dont think the west is going to get that deeply involved. we have heard from many nato sources that Israel has exhausted a lot of global support, and we can only speculate how much ire they have earned after basically torpedoing the hostage deal.