And there's the interesting difference.

On the one hand (all subsequent emphasis added):

George Tiller, 67, who had been targeted in other attacks over the years, was killed just after 10am yesterday in the lobby of the Reformation Lutheran church in Wichita, where he was acting as an usher during a morning service...

A 51-year-old suspect in the shooting, named as Scott Roeder, was later arrested and charged with first-degree murder and two charges of aggravated assault, according to the Associated Press.

And on the other hand:

(CNN) -- An Arkansas man was arrested Monday in connection with a shooting at a Little Rock military recruiting center that killed one soldier and wounded another, authorities said.
Police identified the suspect as Abdulhakim Mujahid Muhammad, formerly known as Carlos Bledsoe.

Abdulhakim Mujahid Muhammad -- a 24-year-old Little Rock resident formerly known as Carlos Bledsoe -- faces a first-degree murder charge and 15 counts of engaging in a terrorist act, Little Rock Police Chief Stuart Thomas said. The terrorist counts stem from the shots fired at an occupied building.

I'm guessing that someone has a lot of leeway in defining the phrase "terrorist act," and that that's never going to apply to the murder of abortion providers, even in a crowded church lobby. Call it a hunch.