You don’t have to only support one side at the exclusion of the other, even when they are fighting. In this case Israel has been provoked into destroying the terrorist organization Hamas. Since not everyone in Gaza is Hamas and Hamas has been hijacking the aid trucks along with the simple logistical issues of distribution, they are now trying direct support via airdrops which are much harder for Hamas to intercept or just be overrun in general. I’ve also seen speculation that they are using it to for training as well.