The gaslighting just won't stop. Terrorists invaded Israel with the explicit purpose to commit genocide against jews, any attempt to fight back against that is criticized. A huge chunk of the whole world just seems to feel like Israel "deserved it", and they should just take it lying down.
Sure, but also Israel had already been committing genocide. The have an explicitly Zionist leader. They kill a shit-ton more Palestinians than Hamas kills Israelis. They also get a lot more support from the west. Sure, Hamas are terrorists, but Israel uses fear and violence (textbook terrorism) to suppress and colonize land. Much of that land is internationally recognized as Palestinian. Israel is not a moral state, and you shouldn't pretend like they are.
When you're engaged in oppressing a whole population for decades, then you should be surprised when people get desperate enough to lash out in brutal ways. That the other side also commits war crimes does not give you any right to commit even more war crimes.
It's not about Israel having to take it lying down. It's about Israel not retaliating against civilians who have already been victims of both Israeli and Hamas oppression their entire lives for actions carried out by a tiny proportion who won a minority of the votes so long ago that the vast majority of the current Gaza population were not even of voting age when the last election were held, and that a majority would like to get rid of (see below).
Had Israel engaged with any kind of humanity, instead of with prominent people calling Palestinians animals and instigating brutal additional oppression, and instead aimed to take on just Hamas and showed they were serious even a lot of people who see Israel as the brutal apartheid state it is would be a lot more sympathetic to their legitimate right to fight back against Hamas.
As it stands, Israel is demonstrating that like Hamas, its government are far-right extremist war criminals who thrives on dehumanizing and victimizing civilians, and whereas Israeli civilians are not legitimate targets, and should have our sympathy, nobody should have any sympathy for their Apartheid government.
To preempt the inevitable attempt to conflate Palestinians with Hamas:
Their citizens demanded it, any country would if they suffered the same attack. Its hard to say exactly what a reasonable response is. Between doing nothing, and nuking Gaza there is some reasonable, measured response. Either side could argue about what that is, but they can't just do nothing, and take it lying down which seems to be what one side is suggesting is the only reasonable course of action.
Oh fuck off there's no way the force Gaza put out ever had a chance of doing that and Hamas themselves have said they expected to fight the military at the border. At this point the only people saying Israel is at risk of genocide are the Israelis themselves.
It's not that it wasn't successful, it's that it wasn't within their capability. So getting upset about something that's impossible in order to justify mass slaughter is an exercise in excuse making.