i believe the bible is to be taken as it was written, letting it speak for itself. I also believe to understand its message you have to know the people and culture around its conception. I.e, JWs believe the GB is the faithful steward of Luke 12. This is not so, because the steward or house manager was a cultural reference, one that referred to the servant to whom the master gave the keys of his house. Thus, the steward was Peter (Matt 16:19)
any attempt to take the bible in some other way than just what it says for itself is to interpret, hence twist it, into something it is not at all. amd this is what has been done with the bible for 1000s of years.
as far as the Quran goes, as I've said Ive only read it once so far. But I see no contradictions to the bible, only a great deal of emphasis on the goal of the Quran being not to replace or even give anything new, but to confirm. I've already studied the bible enough to know Jesus is not literally God and the trinity is not true, hence when I read it in the Quran all I see is fulfillment of the Qurans claim. By his time, Christians were teaching the trinity and the bible was shut up by the church and outlawed. Then Muhammed comes along teaching the truth about a book he couldn't even read (even if he had a copy he was illiterate) and correcting the teachings of said book - not replacing them. I find this very impressive, which is why I'm still reading it, trying to find any cotraditions or errors.
the closest I've come so far is a verse that states when God created Adam the Angels bowed down to Adam. I found this strange and actually stopped reading the Quran. However, I later found in other research that the Christians of his day were reading a book that taught the Angels bowed to Adam because of Adam being gods image. So, this was not a contradiction, and really only makes sense. I read the rest of it.
Im actively TRYING to disprove the Quran, but so far I am unable. It teaches everything about the bible I already believe and provided direction for people living at that specific time dealing with specific challenges.
The Book of Mormon however, contradicts the bible many times. Hence I excuse it. It tries to establish its own truth. As the Quran and the bible both say, God does not change, his messages would never contradict each other.