first off, you're ignoring all his work pre-LOTR. it may be B-grade material, but i don't think it's racist.

second, LOTR was a more-or-less faithful adaptation of a book. so blame any white supremacy there on Tolkien (and see my post above about that). i think it would have been great to see Jackson update it and include some folks of color, but there would have been a huge backlash to that as well.

third... well, i haven't seen King Kong yet and i haven't made up my mind on any racist implications of that flick. to me the story seems to be more about humanity's animal instincts (brutality AND tenderness) than a white/black dynamic. let's not forget that apes are ancestors to ALL humans...