I just noticed and realized that I have never heard of a certain Christian terrorist, all I hear is that when a terrorist is in the news, he/she is a Muslim. I am not saying that Muslims are terrorist, so don't get me wrong.
I can say here categorically that majority or 93% of most the terrorist attacks are orchestrated by Muslims. And this could be attributed to the teaching of Islam which they believe that it is the duty of every Muslims Umar to fight for Allah.