*X-tianity was brought here in Indonesia during the Colonial Times initially by the Portuguese in the 15th, then by the Dutch +1 century later when they defeated the Portuguese.

However, Islam was already well-established here & that's why it thrived unlike in neighboring Philippines my home country where the Spaniards easily converted the locals to X-tianity since the people there were "pagan" - nature worshippers (e.g. sun worship, rain, wind, & etc.)

I guess it's a lot harder to convert people who already have an established religion especially if it's a strong-willed, strong-convicted religion like Islam.