If Israel cannot control and resolve this conflict fast, foreign state fighters and even military units will start pouring in. Followed by invasion of actual militaries of neighbouring Arab countries. Depends on how poorly they perform the Arab states might actually go ahead with their plan to try end Israel as a state.
Then US will have to get involved and this is something Russia and China would be happy to see. Taiwan and SK then would not sleep well.
That's alot of wishful thinking. Jordan has a pony show army, Syrian army is busy, Egyptian army is corrupt to the core, and busy governing and looting it's own people, Egyptian president has multiple overlords etc, so it's like a vassal state, but like tier-2 vassal state. Only credible force is Hezbollah, and so far, despite all the chest thumping, Lebenon is in no state whatsoever to eat Israeli counter strikes and Hezbollah is limited by domestic situation as well as domestic politcs, there is lots of economic hardship in Lebanon, the economy has already collapsed, if their actions bring more misery, they risk loosing support from the Lebanese street. Only way it works is Israel hits Hezbollah first in a dramatic way. This wont happen, for past 2-3 years, Israel and Hezbollah both have gone out of their way to clean up any incidents on the border. Hezbollah is also busy in Syria.
Which practically leaves Hamas alone.
West Bank has been made impotent by PLO old guard, completely disconnected from reality, they are not even a legitimate govt, they literally couped back to power by help of US, Israel and some other regional players, after they lost the elections to Hamas. so PLO is also like tier-3 vassal entity with multiple layers of overlords. This was when Hamas had stronger moderate voices, but Hamas got a big L for playing by the rules and being nice, so they want back to being nasty realists and perhaps many voices turned extremist due to what their people endure everyday.
