BeginnerSleuther
Verified Physician
- Joined
- Sep 17, 2020
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But acting on them? Thinking they are real and shooting others?
It's possible his conspiracy theories had nothing to do with the shooting.
I guess we wait to see if he left any notes.
Based on what we know, there is no indication this is based on any of the conspiracy theories he's posted about, but even if it was, none of those theories fit the definition of mental illness. They're definitely extreme, but conspiracies about real life events (particularly mysteries with no definitive answer, such as the Malaysia Airlines plane) are considered subcultural shared beliefs that are not true/unlikely to be true. These are not mental illness when exogenous, meaning he isn't invoking himself into it. Had he said he was the savior of the MA plane or something like that, that would be more indicative of a mental illness. Delusions are based on inner experiences -- such as they're the savior or they're the subject of something (government bugging my phones, the girl at the coffee shop is in love with me, I'm the love child of a famous figure, etc).
Subcultural shared beliefs are more a reflection of personality and idiosyncratic traits than they are mental illness.