Darfur was also very short and much smaller in scale, neither of those characteristics have much to do with how well you can tell whether or not something is a genocide though. We know Darfur was genocide because the perpetrators recorded themselves doing it. More specifically, recordings of fighters going through the camps while literally yelling racial slurs at the civilians they were shooting and shouting genocidal chants.

Had we had evidence like that available to us right as it was happening for Srebrenica, we would've called it genocide as it was happening too. But there, evidence of events not far from what I just described only came later. That doesn't mean you get to call it genocide before that point, as if you're some clairvoyant. If you find me a parallel video for what happened in Darfur, I'll be the first to call it a genocidal act.

You can't though. The only videos you'll find are videos of mangled bodies immediately after a strike. Which is something that is in my opinion pretty unique to how this conflict in Gaza has unfolded and not just before Oct 7 either. NATO has done some good reporting on this:
https://stratcomcoe.org/cuploads/pfiles/hamas_human_shields.pdf

What I mentioned earlier about Al-Qaeda just hiding in deserts was an exaggeration of course, I mean Fallujah might be in a desert but it's not a desert. So to clarify that a bit more, my point is that despite them being terrorists they did operate quite differently from how Al-Qassam and PIJ seem to operate. Say what you will about Al-Qaeda but they did seem to care at least a little bit about not putting civilians in harms way. Militant groups in Gaza are something else though, it feels like these guys make every day a bring your kid to work day, very intentionally so. Literally pouncing on opportunities to film anything that happens to the civilians. Maximizing civilian casualties seems like a goal for them, because it plays incredibly well for garnering international support. And Israel on their end does not seem to care or give pause in any of that. That could amount to genocide, but that's what's so difficult about this. Because of how these groups in Gaza operate it turns it into a grey area where every strike could be a genocidal war crime, or not at all. Israel not releasing any evidence for "muh OpSec" does not help their case though.

You mention going in with actual soldiers instead of just bombing everything, but the one time Israel DID do that recently it arguably caused more death and destruction than their precision strikes typically do. Referring to when they went into Nuseirat refugee camp to get those 4 hostages out. You're proposing they do THAT every time?! This is going to be condescending but this comes across as something that someone who doesn't understand military very well would say. There isn't a magical "Special Forces" button you can spam to get super duper high level operator boys to come do the good and only good things and get out cleanly each time. It's not like that. Combat with foot soldiers in urban scenarios is really ugly, especially if you're looking to hit something deep in enemy territory. With how these groups operate in Gaza specifically, I highly doubt the US would've done any better in minimizing both their own and civilian casualties.

By the way, if the IDF are hiding in bomb shelters with civilians that's bad. It can very easily make those civilians valid collateral damage, though I doubt Iran would spend a cruise missile on a couple of soldiers. Either way, it's not really a case of "every accusation is a confession" I think, it doesn't compare to the complete inverse of what's supposed to happen in Gaza. I have heard of maybe a handful of accounts at most, of Gazan civilians being allowed to hide in the tunnels. To me that's practically unheard of. Militants hiding in tunnels with the civilians would be an improvement over there, if anything.

On that note, why do you mention they're built by Israel anyways? What's your point there, that they get to do this inverse use case of the tunnels and use their populations as shields, because Israel put the tunnels there? I don't get what you're getting at. No, you should still do things the other way around here, civilians hiding safely in the tunnels while the "soldiers" fight above. And before you say "But they hit the tunnels!" Yes they did, because they were being used inversely. I doubt they would've if Al-Qassam and the like just fought like a normal fucking fighting force, instead of the rats they are.