Hi heathens, I am here "atheisting" on a daily basis.
Anyway, it appears belief is "toxic" to the brain because:
(1) Belief can include non science, while science cannot.
"..that flat earthers exist, (i.e. beliefs in supposedly flat earth) does not disregard gravitational theory, and that scientists believe, does not suddenly change the behaviours of equations in scientific descriptions."
The second quote comes directly from my shameless plug below:
online book on amazon (free for unlimited users)
Give me your thoughts heathens (theists feel free too)
Scientific data that shows that strong belief may be toxic:
via International Skeptics Forum http://ift.tt/2tat9Nm