International faith based schools suitability?

On a similar issue but warranting a new topic I think regarding our two young luk kreung (TH/UK) kids schooling, we also have to think of location.

Near us in Bangkok we have some cheaper priced International schools that appear to be faith based in their mission (7dayAdventist). We are only interested in/have experience of the secular aspect of schooling so should we rule these kind of schools out altogether or would they be an acceptable option? If anything the kids would follow their mothers faith/beliefs (Thai Buddhist) if they chose in later life and would have little interest in these schools missions besides learning the secular subjects of the curriculum?