"For years he talked of the Dark Lord, who was going to bring the wizards out of hiding to rule the Muggles and the Muggle-borns."

It's the "hiding" part that interests me. I remember that the creation of the international wizarding agreement of secrecy (whatever the official name is) in the sixteenth or seventeenth century is a big deal, and that makes sense when you think about it. But while the wizarding community does indeed try to keep Muggles from learning about them, it's rare that they sound scared or oppressed about it - they generally give the impression that they could easily dominate the Muggles if they wanted to, but they don't. An impression confirmed in the second part of that line. The "hiding" part is, as far as I know, the first place where the Death Eater ideology is presented as primarily defensive, an attempt to end a perceived injustice against the wizarding community. We get a second not much later with the ridiculous theory of Muggle-born wizards having "stolen" the magic of pureborns. It's not difficult to read this as yet another reference to Nazi Germany and their way of rapidly going from "the Jews did us an injustice" to "let's hunt them down".

Whether that plan is even remotely realistic is a different question. Intentionally or not, Rowling's numbers add up to a British wizarding community numbering in the low tens of thousands, if not even less - less than half a percent of the British population. Wizards certainly have significant advantages, but all the same, Voldemort can't hope to have a fighting force of more than a few hundred men at best, which seem like extremely long odds against the British armed forces.