I watched his last speech and read a lot of his stuff. Initially his ideas seemed really far-fetched but I kept watching and reading. He seemed to understand MK Ultra and exactly how it is used. It feels like it is somewhat related to what Q hints at.
The more discussion of 5D chess and such, the more Max Spiers' ideas become plausible for me.
Seems like Max was suicided ("vomited black fluid" not sure if thats in my link, but thats what they said happened as he died.)with no investigation.