Do you have a count of the number of people killed in this fashion? Here are a few great facts from OGFT's articles posted above:
Honestly, when is the last time we heard the media refer to those who attack abortion clinics as “Christian terrorists,” even though these attacks occur at one of every five reproductive health-care facilities? That doesn’t sell as well. After all we are a so-called Christian nation, so that would require us to look at the enemy within our country, and that makes many uncomfortable. Or worse, it makes them change the channel.
An FBI study looking at terrorism committed on U.S. soil between 1980 and 2005 found that 94 percent of the terror attacks were committed by non-Muslims. In actuality, 42 percent of terror attacks were carried out by Latino-related groups, followed by 24 percent perpetrated by extreme left-wing actors.
Mainstream media plays up on muslim terrorism stories simply to sell ad space
If you want to find out the reasons you hear that terrorism is almost always a muslim, read the above links.