Ok, lets imagine a scenario where there are 2 developed countries right next to each other that hate each other. One raids the other and kills some people. Generally you might sanction a raid against the military targets that supported the raid, or perhaps targeted removal of the head of state or something.
But thats not the case here. Israel herded these people into this open air prison, removing them from and then settling their land. And kept them bottled up next to their settlements.
The only moral way to approach this situation would be for it to have never developed in the first place. Failing that, you would work to undo it. Heck, as you return every single refugee to their land, you can process them to see if they are a hamas fighter and jail them.
This is the truth of the matter. As Israel uses force to contain Gazans, they are effectively their government. They cant have Electricity, or Internet without Israeli approval. They cant pass border checkpoints without Israeli approval. The Israeli military frequently raids them. They do get black vanned and sent to Israeli prisons all the time. They are defacto Israeli subjects.
Therefore, this isnt a matter of warfare, this is a matter of policing. A civilian response would be best. There is no second country, and the people who benefit most from pretending there is a pseudo state in Gaza, are the Israelis, who use it to justify asymmetric warfare.