I am not well read on this and haven't read the book you're reading but Carl Jung admitted that he was possessed and his 2nd personality was the demon he named Philemon amongst others with whom he communed who gave him his ideas especially about replacing christianity with a sex occult and psychoanalysis religion. He was also a rabid anti-catholic who misqouted scripture and doctrine to make his points. To be polite; not my cup of tea.
Daimon, not demon, big difference: "
Daimon or
Daemon (Ancient Greek: δαίμων, "god", "godlike", "power", "fate") originally referred to a lesser deity or guiding spirit such as the daimons of ancient Greek religion and mythology and of later Hellenistic religion and philosophy. The word is derived from Proto-Indo-European
daimon "provider, divider (of fortunes or destinies)," from the root
*da- "to divide". Daimons were possibly seen as the souls of men of the golden age acting as tutelary deities, according to entry δαίμων at Liddell & Scott. See also daimonic: a religious, philosophical, literary and psychological concept."
Working my way through his collected works, 5 of those under wraps along with his autobiography, many anthologies over the decades, published works by "Jungians," I can assure you, Jung is grossly misrepresented by your summary.