Yes. It wouldn't have been nicer probably since being populated only by ayrians would get boring, but once you are finished with genocide it would be peaceful and strong authoritarian states usually are safe.
Could be safe internally, but that is utterly irrelevant to its neighbors, and the geopolitical order of a world in which the nazis weren’t crushed, the winning empires weren’t dismantled, and the US isn’t the guarantor of global trade and European security in order to combat the Soviets.
If you’re interested in geopolitics reading outside of Philip K. Dick, an accessible but satiating piece I always recommend is World Order: https://www.goodreads.com/book/show/20821140
It’s written by a highly respected war criminal (how many fields can say that!)