If you reading into the OP's post quoting Nietzsche as saying that to adopt the Roman attitude and lifestyle one had to engage in prosecution of Jews as Nazi Germany did, I think you are wrong.
In fact, some people tend to dislike Friedrich Nietzsche on the grounds that his thought is dangerous, that it lends itself to totalitarianism and, more specifically, to fascism. The history of Nietzsche's adoption by the forces of National Socialism in Germany has been well documented. Adolf Hitler personally approved of Nietzsche's writings, and upon coming to power he promoted one of Nietzsche's first Nazi disciples, Alfred Baumler, to professor of philosophy in Berlin. During the Nazi period Nietzsche was both widely read and celebrated in Germany. He was considered to be one of the master-thinkers of the Aryan race. After Germany lost the war, Nietzsche's thought fell into disrepute. Martin Heidegger even blamed his involvement in Nazi politics on the influence of Nietzsche. Since that time, however, Nietzsche's work has enjoyed a modest revival. Nevertheless, Nietzsche is still viewed with suspicion in many circles because of a circumstance of history that was beyond his control. Many critics continue to argue that Nietzsche's thinking is at best dangerous or, at worst, downright evil because it leads directly to fascism.
This argument, though, is simply untenable given a careful reading of Nietzsche's work. From an examination of his texts, skipping the "approved" Nazi interpretations, one can easily argue that Nietzsche would have certainly opposed his appropriation by National Socialism, particularly its hideous manifestation in Nazi Germany.
In 1886 Nietzsche broke with his editor, Ernst Schmeitzner, disgusted over his anti-Semitic opinions. Nietzsche saw his writings as "completely buried and unexhumeable in this anti-Semitic dump" of Schmeitzner — associating the editor with a movement that should be "utterly rejected with cold contempt by every sensible mind".
It is his sister Elisabeth, who in 1886, married the anti-Semite Bernhard Förster and traveled to Paraguay to found Nueva Germania, a "Germanic" colony, a plan to which Nietzsche responded with laughter. Elisabeth, for instance, compiled "The Will to Power," from notes he had written, and published it posthumously. The general consensus holds that it does not reflect Nietzsche's intent. Indeed, Mazzino Montinari, the editor of Nietzsche's Nachlass, called it a forgery. Among other forgeries and suppressions of passages, Elisabeth removed aphorism 35 of "The Antichrist," where Nietzsche rewrote a passage of the Bible.
Although Nietzsche had in 1886 announced (at the end of "Beyond Good and Evil") a new work with the title, "The Will to Power: Essay of a Transvaluation of all Values," this project was finally abandoned and its draft materials used to compose "The Twilight of the Idols" and "The Antichrist" (both written in 1888). "The Will to Power," which Elisabeth Förster called Nietzsche's unedited magnum opus (which very concept is alien to Nietzsche's philosophy and style of writing), was in fact abandoned as a book by Nietzsche himself. Förster-Nietzsche cut up, mixed and pasted together fragments, according to her own antisemitic views (which were a bone of contention between her and Nietzsche himself). Nevertheless, the concept remains, and has, since the reading of Karl Löwith, been identified as a key component of Nietzsche's philosophy. So The Will to Power was not written by Nietzsche. But the concept of "will to power" is certainly in itself a major motif of Nietzsche's philosophy, so much so that Heidegger, under Löwith's influence, considered it to form, with the thought of the eternal recurrence, the basis of his thought.
Not to mention that after he stopped teaching at Basel University in 1879, on a visit to Rome in 1882 at 37 met Lou Salomé, a 21-old Russian-Jewish woman who was studying philosophy and theology in Zurich. He soon fell in love with her, and twice proposed to her. Although his both offers were rejected, the relationship was spoilt by Elisabeth who was absolutely anti-Semitic, and hated the Jewish blood in Lou. Thus Nietzsche has lost his love, and remained alone.