Sorry, but...You're kidding, right? Ever heard of the Crusades?
This site is decidedly anti-Christian, but its list of atrocities is one of the more comprehensive ones on the Net.
Having said that, in CURRENT times the Islamic faith is certainly responsible for the vast majority of atrocities.
The Crusaders were Liberators. Although not always perfect - eg Fourth Crusade and Children's Crusade and often unsuccessful, they at least were heroic attempts to liberate Christian lands that had fallen into Islamic oppression.
You apparently have been brainwashed by somebody—and BTW-your website is disgustingly stupid full of lies.