While I have not read the either Bible or the Quaran in their entirety, I have read most of both...Why wouldn't I? How else would one make an informed choice to follow or not? I also would hesitate to speak about something that I had not learned about. The message of the Bible is grace and mercy and freedom to choose/or not choose God's love. The message in the Quaran is submission or death, conversion or death, you get the idea. Islam means "voluntary submission to Allah" but knowing the alternative, I am not sure how voluntary that submission is...
Richielion says it best=Islam preaches death to unbelievers, in the present. Christianity does not, but preaches to love your enemies.