What movie is this?

There's this movie that is always playing on cable. It seems kind of sucky but I'm curious. I don't know what it is but: It involves some teenager/kid who is Indian-ish and is alternately catatonic/demonic, some priest who has the hots for a nun out of habit or maybe she's a missionary, some younger guy who maybe is actually the priest or another priest as well, some black guys, one who gets shot by some white military guy with some type of accent, maybe British, some other black guy dressed like a shaman, the young priest is attempting to teach the young village kids but the elders don't like it, and demon guy is trying to kill the priest who is trying to exorcise him. What is that movie?