Why did God let people think demons cause epilepsy?

[robvalue]

Any reference that someone "might have demon possession", even when combined with actual regular conditions, is necessarily an argument from ignorance.

I hope people would agree that fallacious arguments like this should not be part of medical diagnosis.

The bible contains the ignorance of its time. To try and pretend otherwise involves contorting your brain so hard that you just convince yourself it doesn't say what it says.