Gay reference?
I think the men-men relationship in this movies heavily hints homosexuality... i mean dishonerable military discharge, remote mountain location... The two main characters get really really close in a bunch of situations... The craving, hunger whatever, for "flesh"... and they don't eat a women at anypoint in the movie...
I think, it's not that far fetched, that in a time where homosexuality was considered a crime punishable by death, some people started to silence confidants by brutal means. Since that would not be a very popular story, it's disguised here as a canibalism horror tale. What do you think?