We have books that claim unicorns lived in the woods. It's like when I argue with Christians..."well...the bible says so....." Excuse me for wanting an independant source. Does the Koran not say Mohamed flew on a horse? Not an aeronautics expert...but that would take some doing.
Juice dear dear. Every religion has some metaphysical stuff and then some practical stuff.
I urge you to enjoy the metaphysical stuff as a nice "lesson learned" thingy. While try to follow the practical things.
It will be unfair or rather $tupid to sit around an argue if Jesus pbuh walked on water. or healed the sick, or brought back the dead. Perhaps it was real life thingy, perhaps it was metaphorical. Just read this metaphysical stuff and move on to the practical day to day issues. If you feel bible has the answer great. If you feel Geeta gives you the answers, super great, if torah is the way for you, then super duper great.
Same thing with Meraj, the horse, the unicorn or whatever it was. If you like Mohammad pbuh "flew" to "Aqsa" the temple mount. Quran says;
Exalted is He who took His Servant by night from al-Masjid al-Haram to al-Masjid al-Aqsa, whose surroundings We have blessed, to show him of Our signs. Indeed, He is the Hearing, the Seeing.
Quran, Sura 17 (Al-Isra), ayah 1.
Should we sit around and discuss the rocket propulsion and how Barak the noble steed could "fly" and at what speed?
That will be useless discussion.
Just read it as a story, and ponder. Perhaps Quran is linking symbolically Mohammad to the Abraham, the Solomon, and other holy men. Who knows. Read it and enjoy it if you can.
But for crying out loud, do not use this to beat up Muslims as this will be kind of bad for someone who professes to a divine religion (I am assuming you are Jewish by faith).
peace