Lyric discussion by Targeter 

Cover art for Ashes in the Fall lyrics by Rage Against the Machine

This is probably my favorite Rage song ever. The metaphors and imagry Zack uses are exremely powerful. Just some more analyzing:

"Like swollen stomachs In Appalachia" Applachia being the poorest area of the United States, located in the general area of the mountains in name. Trust me, I've been there... if you've ever wondered where cars from thirty years ago and old school busses go to die, its in the front yards of Appalachia.

"Like the priests that fuck you As they whisper holy things" This is probably supposed to just mean mislead or at worst betray, this song was written before the whole widespread accusations of Catholic priests for molesting members of their parishes. Makes it more poingent after all that though.

"A mass of tears have transformed to stones now Sharpened on suffering Woven into slings Hope lies in the rubble of this rich fortress Taking today what tomorrow never brings " This is pretty straightforward, and probably my favorite part of the song. Just saying that the pain and suffering have caused a revolution.

Zack seems pretty well versed in history and politics. I think there was widespread corruption in the church, sexual as well, throughout the years. I remember reading about a Catholic Bishop who had sex with little boys and tortured them. Pretty screwed up. So I agree with your interpretation, but Zack probably wrote the line with history in mind, but also with a metaphorical bent regarding power/faith in general.