Karl Jung, The Collected Works Volume 18, The Symbolic Life (1939), Princeton University Press, p. 281. The chapter is itself called "The Symbolic Life", and Jung was asked two questions, the first of which is the most relevant:
First, had he any views on what was likely to be the next step in religious development?
"We do not know whether Hitler is going to found a new Islam. (He is already on the way; he is like Mohammad. The emotion in Germany is Islamic; warlike and Islamic. They are all drunk with wild god). That can be the historic future."