The
deliberate killing of a
large number of people from a
particular nation or ethnic group with the
aim of destroying that nation or group
Well, let's start with: A
im of destroying that nation or group. How does killing 1700 people, many of whom weren't Israelis, or even Jews, translate into an attack "with the aim of destroying that nation or group"? They may have that rhetoric in their "manifesto" but they aren't capable of carrying it out, and you were talking about the October 7 attack, not a campaign. So it immediately falls short there.
Then the numbers involved: 1,700 on an Israeli population of 10 million is it? 7-8 million Jews? That isn't genocidal either. Then you have the target of the attack. I know for a fact from Thai people who are back in Thailand now, that Hamas knew they were killing foreigners and even said they were under orders to kill foreigners, some of them could even say hello in Thai to the people they were attacking. Why were they doing that? To attract global attention to their terrorist attack. Unless I am mistaken, people committing genocide generally want to keep it quiet and with a plausible deniability of provable intent, which is a prerequisite for a charge of genocide.
Anyway, I could go on. But it was a terrorist attack, not genocide. In the same way that what the Israelis are doing is committing war crimes against the civilian population, not committing genocide. Yet.
All imo, of course, which is why I said imo before.