Also, there was a video earlier in the thread showing how cheap and complex tunnels can get. There's a city underneath Gaza that cannot be gassed, flooded, bombed, or cleared safely without serious casualties. Israel is FUCKED in a ground invasion, it will take years to break Hamas. Every problem Russia has taking cities in a very depopulated Eastern Europe will be magnified by a million. Limited ingress. Low initiative. Air power is a limited advantage in urban and tunnel combat. Supply lines can be constantly harassed by rocket artillery from Hezbollah. All escalation to accelerate the end of the conflict or force Hamas into a pitched battle are labeled as genocide and threaten regional war. Any humanitarian corridor is just a ratline for weapons and men. Hamas have been planning and testing and building networks of tunnels and defensive plans since the Second Intifada, and even if the governments of the neighboring countries aren't able to commit to war, Arabs are likely to keep supporting them and pressuring their states. When people want to go to war, states usually take the chance.