That and the sheer audacity to have a concert right next to Gaza was a recipe for disaster that Israel took advantage of for its own ambitions.
It’s not like the Israeli government intentionally set up a music festival next door to Hamas to get participants killed. Your implication is incredibly nefarious. This was a privately run festival full of people who were advocating for Palestinian rights, set up more than 3km away from the border. How much of a buffer zone between Gaza and Israel are you suggesting there should be? 5km? 10km? For context, the width of Gaza is as narrow as 4.5km.