I don't know the context in which IndustryStandard is replying. That was 5 months ago; my views on Israel have dramatically changed since then.
Gaza wouldn't be in the state it is now if the 7th of October massacres never occurred, if Hamas, which Israel fostered, never carried out the attacks. It'd still be greatly oppressed, but not a smoking rubble with a starving populace. The reason absolutely does matter since that's the excuse Israel uses to carry out their genocide, 'Oh, those civilians were totally just collateral! It's war! This happens despite us having the most sophisticated intelligence agency in the world'
Pointing out that Israel used the massacres as a proxy to carry out their extreme violence isn't defending Israel. It's not saying that Israel is justified, I'm not making any of those claims. Admittedly, I could've specified, so I'll do so now:
The 7th of October massacres were the triggering event that allowed Israel to pursue a level of destruction that wouldn't have been politically possible otherwise. Identifying that this is the moment the mask fell doesn't justify Israel's actions. The responsibility for the destruction lies with Israel, which is choosing to destroy Gaza. If these massacres never happened (which I need to stress, Israel's intelligence was well aware of these attacks and allowed them anyway), would Gaza be in the state it is now?