I hope this answer is sufficient for the sub, but I've read Helter Skelter by Vincent Bugliosi, the prosecutor in the Charles Manson trial. Bugliosi's case was built partially on the idea that Manson thought the Beatles were sending him hidden messages, particularly in the "White Album" about a coming race war called Helter Skelter. During this race war, Manson and his followers would live underground somewhere in the desert in safety, and then come up after the war was over and rule over the blacks, who in Manson's opinion would not be able to rule themselves.

According to Bugliosi, Manson thought the race war wasn't coming about fast enough so he and his followers would trigger it with the killings, and after killing the LaBiancas they wrote "Helter Skelter" in blood on the wall, which would seem to support Bugliosi's theory.

I believe Manson always protested his innocence and claimed the notion of "Helter Skelter" as a race war was just an idea dreamed up by Bugliosi.