Why should the other Muslim nations give a shit?
There's such an obvious power imbalance between Israel and Palestine. Palestinians will keep attacking out of pure spite because there's absolutely nothing they can do to change the situation.
"They could stop firing the rockets" you say.
But yeah. Like that's going to happen. The "country" is so fractioned that there's no central control over these acts. Who is going to make them stop? Heck, even if some central authority managed to make the attacks stop somehow there'd still be armed independent groups active and I'm fairly sure they'd keep on firing rockets.
Israeli retaliation will only kill more people, and that will make even more people hate Israel. It's a never ending spiral of hate, and the only realistic way for this to end is for Israel to calm down.