Have you seen any of the raw footage after a bombing? It is very clear that they want to cause maximum damage and to scare people away. They want to make the area uninhabitable. In addition to killing people, they are purposefully destroying the architecture. Why would they demolish empty universities? Why would they destroy mosques, churches, schools, bakeries, markets, etc…? Why would they completely destroy roads? This goes far beyond targeting Hamas. They came in with the intention of wiping the area out to resettle it themselves. To do that, there needs to be no Palestinians left. So they either need to be killed or forced out and they will have nothing to return to.
The line was crossed a long time ago.