>the Roman Catholic Church has a long, pragmatic history of absorbing local traditions in Indonesia.
This is straight out of the Manichaeism playbook whose followers believed that a wide range of previous belief systems including Platonism, Buddhism, Zoroastrianism and Christianity each had a part of divine truth in them. This allowed them to absorb a diverse set of followers and contributed to them being one of the fasted spreading religions in Late Antiquity even giving Christianity a run for its money.