They don't ask the "citizenship" question so the wealthier illegal aliens from South Asia send their kids there.
Makes me wonder why a Catholic school in Indonesia would ask the "citizenship" question. That's so terribly "un Catholic".
It might be un-Catholic but it is terribly Indonesian. Not odd at all. It would be odd if they didn’t ask. Origin is very important to them.
I doubt rules in a US parish school in these PC times have much to do with those in Indoenesia in the mid to late '70s.
They may have had to make reports to their government, which required the citizenship status. As to the religion question, maybe they wanted to be sure not to offend the religious sensibilities of their students, or more likely of their parents.
I'm sure it also would depend on the "order" running the school. Some probably wouldn't even take non Catholic students, others would encourage them.