I think alot of Arab people are surprised that something that wasn't able to be done by the previous generations was able to be done by this one, under much more difficult circumstances. I think a psychological switch was turned on, and their is a belief that not only can they do the unexpected, but they can also hold settlements (for some time). Not just a raid in and out. And Israel can be defeated. The reason everyone is signed those accords is cause that belief was beaten out of them. Jokes on them.
Ultimately, no one will let Hamas and PIJ be systematically destroyed by invasion. If Israel wants to miscalculate they can, but they likely have to deal with escalation from the Axis, and destabilized Egyptian and Jordan borders. Good luck lol. Even without Iran involvement directly, they can do major damage to critical infrastructure.
Do the Americans have the balls to bomb Hezb targets in Beirut in support of Israel? They should be prepared to deal with the aftermath of that.