There’s a difference between stupid and crazy. Even a very stupid person may instinctively not put their hand in a roaring fire; but a crazy person will, then slowly remove their smoldering hand and complain that the fire is not hot enough.
What makes it even creepier is that there are several flavors of crazy, such as self destructive or suicidal, psychopathic, schizophrenic, paranoid, etc. And they are not necessarily exclusive, so someone might be a “Neopolitan” crazy.
Well, I think it’s just plain old gullibility, rather than craziness. Most women aren’t converting to Islam on their own; they fall in love with some guy and then let themselves get conned into converting. So, they are just plain old suckers, as far as I can tell.