Even if she is not that religious, chances are her family is, and they will not tolerate anything but a Muslim wedding.
Dating older men for an Indonesian girl is not necessarily seen as a bad thing, because older men are deemed more adequate to provide girls with the security they need.
Yet, the age difference may also be a difficulty because it adds to the incomprehension between the two partners.
Religion: This is the second most important topic when dating an Indonesian girl because few of them will make a compromise about it.
If you are catholic and no ready to adapt, then you will have some troubles finding an Indonesian girl who suits you.
Expats dating Indonesian girls are numerous, and many will find that though certain aspects of their relationships are much easier than with a western girl, there are also some difficulties that men need to take seriously if they want to be successful.