They are the ones mentioned re Ambon and Sulawesi. This was a concerted campaign to drive christians out of these regions where Mulsims live.

Am not sure of the connection to driving tourists out of far away Hindu Bali.
This anti Christian crusade has been percolating away for the past 8 years. In central Java in strongly Muslim areas there are viilantes going around attacking bars etc: & threatening to kil Americans.

But as regards car bombs in Bali, the thread seems weak.
Some of the Balinese I have heard of, will happily cut the throats of any trouble makers who come in and threaten their stability. If there were Muslims who did the Bali deal, they will be uncovered quickly. If no one is able to trace anything re the perps, then deeper questions should be asked about why.

Cheers Doug