[Quranic Reflection]: moon absorbed by the sun in the Quran: far future.

[Apollo]

It's unsurprising to find a pitch that appeals to young men arising from the religious standardization of a warlords divine warrant.  They're appealing to recruits.  The same thing is happening in the bit about the sun and the moon.  It's an appeal to an audience that would have already expected and believed that celestial events could be portents of doom.  Learning more about those events may have disabused us of the notion, but in doing so it rendered the narrative element meaningless, vacuous, and so it has to be filled up.  In the case of Winter and many muslims, ironically, it gets filled up with fairy themed pseudo science.

That explains most of it, yes, but except the pseudo science part.  Even pseudo science implies that a person has some understanding of underlying scientific fact or phenomenon but when you're dealing with meteorites as weapons thrown at jinns and demons as means to shoo them away, whereas jinns are made up of fire (here is another element to go into chemistry elementary table, and people yet providing explanations for it then it's really beyond pseudo science.  It's simply mental contortion of the stupid kind. There is not even basic science at play here.