Terrorism?

COLORADO SPRINGS, Colo. (Reuters) - A gunman stormed a Planned Parenthood abortion clinic in Colorado Springs on Friday and opened fire with a rifle in an attack that left three people dead and nine others injured, authorities said. (Yahoo News-Reuters)

We don't know the gunman's motives, but let's assume he hated abortion for the abomination that it is, and that his hatred of this evil sprang from his Christianity, and from there he was motived to go to an abortion clinic, and in violation of Thou Shalt Not Murder, start shooting people.

Is this terrorism?

Is Christianity to blame?

What makes this different from Islamic violence?

Do protesters have blood on their hands?

Police declined to discuss the gunman's motivations. But the president of the Rocky Mountains chapter of Planned Parenthood, Vicki Cowart, suggested a climate of rancor surrounding abortion in the United States sets the stage for such violence.

The Colorado Springs clinic has been the target of repeated protests by anti-abortion activists, and in recent years moved to new quarters on the city's northwest side - a facility derided as a "fortress" by critics of Planned Parenthood.

People from my church (among many others) protest at that clinic every Saturday. They protest peacefully, they do not attempt to block the entrance, they do not hinder people coming in and out, they don't scream at them, in fact, they do not even address the customers because they do not in any way want to appear threatening or intimidating. I know the priest that conducts regular masses in front of Planned Parenthood. Father Bill Carmody is a local media personality for his outspoken opposition to abortion.

Is Father Bill to blame for this?

Do the protesters (which sometimes include my wife) share the blame for this?

What additional circumstances or factors would lessen or increase the culpability of anti-abortion protesters and the Christian churches they attend?