>the definition of "scientific belief" used in this context is something like "belief held by people in the scientific community"
I hope not. The definition of "scientific belief" is belief in something supported by a scientific method. Put another way formally and rigorously established based on agreed axioms.
Being a scientist doesn't make your belief that you're Imhotep reincarnated a scientific belief.
The definition of "scientific belief" is belief in something supported by a scientific method.
How many examples on the OP did you read? How many of those examples were supported by a scientific method? (Probably some, but not all.) I think my definition better suits the context, quibbling aside.
I hope not. The definition of "scientific belief" is belief in something supported by a scientific method. Put another way formally and rigorously established based on agreed axioms.
Being a scientist doesn't make your belief that you're Imhotep reincarnated a scientific belief.