My Sith Wars are completely realistic and have real-life parallels just like the Rebellion from the original trilogy was based on World War II and the American Revolution. I’m no historian, but I can’t think of a single war where a guy created two armies only to make them fight each other (simplest least convoluted Clone Wars explanation).

Well, there was that one time Satan rebelled in Heaven…

And theological connections vis-a-vis Palpatine do seem to have been on GL’s mind in the prequels. Darth Plagueis’ name, for instance, is a Paradise Lost reference.