Both Christians and Muslims have radical sects in them. It is not right to condemn all for the criminal actions of some.

During the twentieth century, members of extremist groups such as the Army of God began executing attacks against abortion clinics and doctors across the United States. A number of terrorist attacks were attributed to individuals and groups with ties to the Christian Identity and Christian Patriot movements, including the Lambs of Christ. The motive for anti-abortionist Scott Roeder murdering Wichita doctor George Tiller on May 31, 2009 was a belief that abortion is criminal and immoral, and that this belief went "hand in hand" with his religious beliefs.

This is terrorism with strong Christian ties - but it cannot be used to say that all Christians are in favor of killing abortion doctors.