I get tired of hearing that Christians participated in atrocities. No Christian would ever do such things...however, people claiming to be Christians, or thinking they were Christians, would. Jesus said that not every one who says Lord, Lord was one of His.
I've heard people say the same about Islam!!
Innocent, bishop, servant of the servants of God, Ad futuram rei memoriam ...our beloved sons Henricus Institoris and Jacobus Sprenger, of the order of Friars Preachers, professors of theology, have been and still are deputed by our apostolic letters as inquisitors of heretical pravity...