Christianity has been around about 2000 years. Islam has been around 1424 years.
So to give Islam a fair comparison on how well they've evolved you should really go back to see what the Xians were up to in the early 15th Century.
If you look at what the Christians were up to in their 1424 - you'll find some crusades (anti-hussites). Fast forward another 68 years, and good clean Xian boys are set to indulge in some really large scale genocide with swords, guns and biological WMDs: smallpox & influenza.
26 years on: In 1450 the first major witch hunts began in Europe - they continued on, reaching a peak in 1550-1650.
In 1792 Poland was the last place to execute someone for witchcraft in Europe.
In the 1830's The church ceased the execution of Witches in South America.
Even my own fair city's history has bad things to tell about Xians - the good Xian folk turn up to sell drugs and are forced to invade when the evil pagan Chinese refuse to legalize the sale of opium.
And it has been argued that Hitler, as a Catholic, may have had a Xian agenda with his extermination of the Jews.
So you don't really have to go too far back to find bad things happening with Xian hands on the trigger, but as I say - to be fair, one should really look at all the bad things the Xians were doing in their 15th century of existence.
The crux of the problem, in my opinion, lies in a inherent contradiction in both the religions: while the religious are told to emulate their God in order to be good and merciful and to be assured of a place in heaven, the holy books spend a lot of time depicting their God as a barbaric genocidal maniac, killing and torturing swathes of unbelievers. This principle, coupled with a knowledge of the symptoms and effects of syphilis, certainly explains much of Western history and politics.
