Valid question. That happened some years ago in Ambon. And it went both ways - a brutal tit for tat. But it's pacified now.. and life has returned to normal.

Indonesia has more than 200 ethics. So first and foremost it's normally about race and land, fueled by economics.. religion is in 99% of cases just a cover.

Did you know that tribesman in Borneo put heads on a s-tick if someone messes with their daughters? Happened to some young Muslim man from Madura years ago. But then media (financed by plantation companies looking to grab land) made it about religion and fanatics bought right into it... A full blow es--calation happened as a result of it, lasting many years. (somewhere in Afghanistan a bell rings I guess)

Not long ago something similar happened in Sulawesi.. a Christian family got murdered in their home by some Muslims.. that's how the media spun in, so it sells. Turns out they were robbed.