I brought up the roof knocking because it's what Israel does aswell as dropping leaflets and sending text messages and making phone calls before the strikes. This goes against all the accusations about genocide and intentionally targeting civilians. It would be quite cynical to think that this all is just a cover up so that they can continue with their plan of murdering every single Palestinian. I'm just not buying that. The high number of civilians in that area are a huge inconvenience for Israel and killing them is extremely bad PR. They know this and Hamas knows it aswell.
For the high number of civilians killed I think the most simple explanation is also the most likely to be true; it's urban warwafe on a country with extremely tiny land area and a population of millions. You could blindly drop a bomb quite literally anywhere there and you're likely to hit someone. This is what war looks like.