People who are not involved with Islam at it's centre will not understand. SEA Muslims all think in terms of 1 brotherhood of Islam. That's not an Arab thing. That's a Malay/Austronesian thing.
Arabs consist of tribes that will happily find excuse to murder and rape each other and justify it as god's will. I include the original Jewish tribe in this. They originated and spread the concept. The DNA of Abrahamic religions is righteous conflict. As long as people believe in the Abrahamic religions, we will have people starting conflicts because they say they are right. In simple terms, I can, should and will whack you because I am right. It is god's will. It's no surprise that wherever accepts this religion and it's derivatives will always seek to bring violence to others. A good example is Nazi Germany. No different from Israel. Or US and Middle East. Even India being torn apart by Muslim righteousness.
The DNA of SE Asia natives is largely one of co-operation. When the two mix, they exchange ideas.
Islam gets more kindness/co-operation from Malays/Austronesians while Malays/Austronesians get violence and conflict from Islam.
So back to your point. Why no one rushing to help? Because they are the wrong Muslims. They are Shia therefore they are not correct. Therefore they deserve to die. That is the reasoning behind Abrahamism.