Some filling in on the intellectual history of Nazism and the spread of anti-Semitic myth seems in order:
Plainly, the defeat of “Nazi Germany” neither displaced the German language nor the German People (in their majority) but it did transform Germany into a modern and multicultural state haunted by and reacting to the crimes of the mid-20th Century.
The brutal, cowardly, and underhanded methods developed by the Nazis in their achievement and expression of martial and political power may remain — and I hope they remain – unparalleled in intensity and scope in history. Lesser cabal, like ISIL, and some states, as with Russia’s behavior in Syria, may prove equally sadistic but lesser in reach, not that we don’t pay attention.
Regarding Islam and “how many Islamists” — Daniel Pipes has been publishing on that question since 2005 — there are some approaches to coming up with percentages, but the bottom line is that Muslims would seem first in the way of jihadi violence, and so much so that their own security interests focus on keeping the Muslim Brotherhood and their relations neutralized and largely out of power.
The Moscow-Tehran relationship with Hamas and Hezbollah and others and the histories both centers of power have had with terrorism might encourage a good look those two and their historic promotions of anti-Semitism plus participation (state sponsorship for) associated with terrorism.
The prompt: an Islamophobic tirade blanketing all absent of resolving observation and reflection.