Except the qoran does call Christ a messiah and states he was a death equal to Adam just like the bible does. It also states emphatically that the bible should be taken as inspire word and everything the qoran says is meant to be taken with the bible as a confirmation of it.
So, I would submit that the issue isn't the qoran, but rather how it's been twisted and interpreted- same as the bible.
consider for example how the western world responded to the Ottoman Empire. When the Muslims were on their crusade, they didn't harm the citizens of the countries they took over unless those people attacked - at which point they defended themselves. the only people they killed are those who attacked them like soldiers. If they could take them captive they did, at which point they accepted Islam or died.
Now compare that to the crusades headed up by the Catholic Church. They not only beat the Ottoman Empire back the the Middle East, but they invaded their towns, especially Jerusalem, and killed every man woman and child they came across. They had no mercy at all. The blood running in the courtyard of the temple area is recorded to have been ankle deep when the crusaders were finally done, with body parts piled up on street corners.
The Ottoman Empire showed far more mercy, and would never have killed innocents arbitrarily like the church army did (or, ironically, as Isis or alqueda do today).
personally, I think the crusaders were far more barbaric and terrible than the ottoman army was.
Source, this book: http://www.booksamillion.com/p/Templars/Piers-Paul-Read/9780312555382?id=6223161565069
which i I no longer have because someone borrowed and never returned.