the primary reason Hamas has political power and the political support to attack Israel in this manner is because Israel:

• treats all Palestinians as second-class citizens and subjects them to a system of political, social, and economic apartheid
• holds millions of Palestinians in squalid and inhuman conditions, and seizes the territory of millions more in the name of a violent settler project
• subjects the vast majority of Palestinians to state-sponsored discrimination, terror, indiscriminate bombing, and political violence
• leaves Palestinians no feasible democratic path to the rights they should have in their current state or the state of Israel, making armed struggle inevitable

you can and should condemn Hamas, but it is inarguable that Israel routinely does worse—overwhelmingly to people just as innocent as the ones Hamas is murdering—which is what makes attacks like this inevitable. you cannot do what Israel does and not expect the outcome to be violence, and it is incumbent on Israel, who holds all the actual power in this dynamic, to break the cycle and stop using every terrorist attack perpetuated against it as an excuse to roll innocent heads.