Conversation so far:
Why did people criticize Jane?
The System of Antichrist, posited that Roberts multiplied the self due to a fear of death.
Was it considered Satanic?
The Seth Material has been considered in certain circles to be "a book entirely written by a demon.

Question: Did people think that Jane was possessed by a demon name Seth?
Self-contained rewrite: Did people think that Jane Roberts was possessed by a demon name Seth?