"where is the proof it was by christians?"
From the answering -islam site.
http://answering-islam.org.uk/about.html
"This all said, we are Evangelical Christians and agree without reservations with the statement of faith as given, for example, by the World Evangelical Alliance and the Lausanne Committee for World Evangelization."
The passages they mention may be there, but cannot be proven to be inaccuracies or discrepancies. this is why no weight is given to their arguements. the following is an entire site used to refute their claims
http://www.answering-christianity.com/quran.htm
http://www.answering-christianity.com/ac.htm
Christianity and violence
http://atheism.about.com/library/FAQ...viol_index.htm
Did jesus change mosaic law?
matt: 17“Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them.
tim:8 We know that the law is good if one uses it properly. 9We also know that law[a] is made not for the righteous but for lawbreakers and rebels, the ungodly and sinful, the unholy and irreligious; for those who kill their fathers or mothers, for murderers, 10for adulterers and perverts, for slave traders and liars and perjurers–and for whatever else is contrary to the sound doctrine 11that conforms to the glorious gospel of the blessed God, which he entrusted to me.
Jesus was a man of peace, but did jesus promote violence at any time?
(matt:6}But if anyone causes one of these little ones who believe in me to sin, it would be better for him to have a large millstone hung around his neck and to be drowned in the depths of the sea.