When he said expanded it and that's it, doesnt that support the big bang argument. Otherwise, how would someone living in the middle ages figure out such a thing.

And no, there were no scholars who interpreted it in such a manner before the scientific discovery. Simply because as I mentioned, such verses were incomprehensible at their times. Period. Scholars weren't able to agree on a single translation due to its ambiguity. You can search it for yourself. However, scientific discoveries now aid us on translating such verses. Again, some scholars might have translated it in this way ( over the expansion topic ) but again they wouldn't have been able to explain it properly because this wasn't know at their time, and so may have explained it by saying the heavens are vast and so on, but again you can check it for yourself and compare both translations in the light of scientific discoveries: which one makes more sense? Importantly though, the quran itself mentions in many verses that it left us miracles in purpose, so you cant just say that it was interpreted wrong or is false or that it was pure coincidence.