I studied the Holocaust in high school and college and I'm firmly of the opinion it's not if there will be another one, but when. I think the "where" is probably a given: Israel. If something's not done to stop Iran, we may very well see widespread destruction of the Jews in Israel in our lifetime.
The fact that Germany has banned circumcision, the French president declared that no country could be Jewish anymore than a table could be Catholic (despite the fact that there are many countries which clearly identify and govern as Catholic or Muslim), and the E.U. and U.N. are pretty hostile towards Israel is also alarming.
See, it's the same old European antisemitism in sheep's clothing. Since the Holocaust, it's not been PC to hate Jews, so now everyone hates Israel, because it's okay to hate a country. But when you see that no other country gets as much hate as Israel (even countries committing genocide, like Sudan and Rwanda, have been admonished by the U.N. much less than Israel), it's easy to see that hating on Israel isn't legitimate or rational: it's antisemitism.
In the same vein, it's wrong to oppress a religion, but it's okay to deny religious practices on medical/humanitarian reasons. The very fact that circumcision has been declared a "serious and irreversible interference in the integrity of the human body" in Germany implies that Jews (and Muslims) who perform it are barbarians/baby butchers.