Hamas wanted to kill as many citizens of Israel as possible

Source?

This is false. Hamas is not free of criticism, they did commit needless killing of civilians, but their main target remains the IDF. This is contrasted with Israel, whose target is civilians.

Even the music festival was located right next to the Re’im base. The festival itself had Israeli gunned men and tanks. Again, I do not condemn the civilians needlessly killed by some Hamas members, but the operation’s target was the military.