It is unusual for the media to actually use the term "Christian terrorists", even though most terrorism in the U.S. is commtted by Christians.
The terrorists in this country tend to be christian.
Most religions are extremely intolerant of one another.
American christians are pretty intolerant of just about everyone who isn't them.
That's one of reasons we got 45.
I tend to group all religious fanatics into the same box of being "dangerous" no matter what religious faith or sect. In the U.S. the vast majority of religious (and therefore dangerous) fanatics are Christians.