I don't have the full context of the thread here, but it sounds to me like you're saying '9/11' was at scale x, and therefore a benchmark is established for acceptable 'repercussion cost.'
If that's what you're saying, I guess I'd flag that the 'repercussion cost' for 9/11 is still very much open to debate, and there is significant data to point towards almost every step the US took as a reaction to 9/11 being problematic, ranging from who was targeted, what the collateral impact was, and whether it actually solved any of the underlying problems.
The civilian count of October 7th was 695 people. Not that that makes it any better, but it's about a 50% increase to push it to 1000. The population of Israel is about 9.5 million. So your actual ratio is closer to 1 in 13500 or so.
If we're keeping the scales, then an October 7 situation happens in the Gaza strip every time about 170 die. I think if you look the numbers of the current and historical conflicts it might help shape perceptions.
Also, I wouldn’t go into such numbers, because if these matter, then actions of Hamas are very easily justifiable. The story is way more complex than these numbers.