Islam has been in operation since the 8th century and have a toll of millions massacred
the Nutzis were amateurs in comparison
Hitler had a lot of respect for Islam, which says something. He hated Christianity because he viewed it as weak, whereas Islam was just as psychotic as himself, and so he admired it.
Actually Muslims have been in operation since the 7th century. They had already been invading all the way into Spain when they were stopped in the Battle of Tours in 732. When you go to Spain you can see the profound influence the Muslims had on their architecture.
https://architectureofcities.com/moorish-architecture
Muslims also had profound effects on the local and adjacent populations.