Are you saying that because there was not a scripture advocating the inquisition that killed/slaughtered, staked, burned, hung-drawn and quartered - that it must not have happened? OR must not have been perpetrated by Christians - ordered by Popes?
Please don't be silly. Of course Christians have persecuted others, mostly about 400 years ago, and involving, at most several thousand deaths over the entire course of Christian history (not to diminish the cruelty of any religions persecution). On the other hand, literally millions of Christians have been martyred during the 2000 year history of the Church especially when massive waves of persecution hit the early church.
For the remainder of the point of my post, please see my more recent post, above.
Evil people, posing as true Christians, can misuse Christianity for evil ends; but its scripture and doctrine do NOT advocate such action, and good Christians do not do such things. Koranic scripture and doctrine are quite another matter.