thanks guys, i might not have the stomach for texas chainsaw massacre after all... but hey, if i read it as a comedy... perhaps. but wait-- it was based on a real serial killer. maybe i just don't wanna know.
IBG was definitely NOT in poltergeist. i googled up a bit and there are 2 movies that coined this trope, in quick succession: 1) the amityville horror, 2) THE SHINING (this i recall).
poltergeist is only guilty by association or bad recollection, but they made a clear point that their cemetery wasn't indian-- i just watched that yesterday. the one that had indians was POULTRYGEIST which is the Troma version but is obviously a huge parody.
anyway more info here. i like this one:
http://www.atlasobscura.com/articles...burial-grounds