I do not approve of what Doctor George Tiller did for a living. But I do not believe he deserved to be murdered for it. The way to stop abortion is through education, not legislation, intimidation, and terror.
This is an act of terrorism, and I hope the killer is convicted under the most dire of those laws. The coward deserves to rot in Gitmo for his action. If the murderer had the courage of his convictions he would have worked to end abortion through legal means.
Update and Note: Tiller performed late-term abortions on fetuses that were either not viable or barely viable. His services helped women like the one in this story, who desperately wanted children but had a complication that forced them to choose between having a child who might die soon after birth anyway, or if the child lived, might be mentally and physically disabled so severely that "life" would be miserable and short. While I still do not condone abortion, the acts of this doctor are in that grey area of my moral compass, where I only pray I never have to deal with myself. I take back the first sentence of this post.