You do not seem to understand the logic here. Palestinian are in an existential crisis anyway, Israel has been taking small bites for last 20 years without almost any consequences.
It is better to perish faster And make it consequential for the enemy rather then dying slowly without any effect.
Becuase as i said, in the end you are in existential crisis anyway.
Now of course, Palestinian will die in large numbers. But guess what? Now Hamas has forced Israel to take a big bite. Which may not be very consequential military for Israel, but big wars and military operations are surly gonna have geopolitical and perhaps, economic consequences.
If Israel is forced take one big bite after another, then maybe in the future, one of them could very well get stuck in throat.
Actually it's not about logic, some people are celebrating it. They want you to know that they enjoy seeing people's suffering, but that's okay anyway this Israeli-Palestinian conflict does divide people into two camps, and no middle ground in between.
Like I said, this war will likely outlast the main backer of Israel, and again (my deleted post) has confirm that in Islam it is allowed to retaliate in kind, so even if it doesn't happen now, in the end whatever harm they may befall to the Palestinians, please know that we will do the exact same kind once the balance of power reversed.
They want to flatten Palestinian house ? please do so. We will do it as well, later on with their houses, Want to revenge? so do we. Want to harm children and the elderly? so can we. And when it's our time to do so, we will have no remorse because it's allowed by god to do so.
Again justified by the simple verse :
And if you punish [an enemy, O believers], punish with an equivalent of that with which you were harmed. (An-Nahl:126)