The FBI has a definition of "domestic terrorism" to keep things clear. This is what the most wanted people who get charged with it are charge with (and there have been abortion bombers charged with this before).

http://www.fbi.gov/publications/terror/terror2000_2001.htm

There is no single, universally accepted definition of terrorism. Terrorism is defined in the Code of Federal Regulations as “...the unlawful use of force and violence against persons or property to intimidate or coerce a government, the civilian population, or any segment thereof, in furtherance of political or social objectives.” (28 C.F.R. Section 0.85)

The FBI further describes terrorism as either domestic or international, depending on the origin, base, and objectives of the terrorist organization. For the purpose of this report, the FBI uses the following definitions of terrorism.

l Domestic terrorism refers to activities that involve acts dangerous to human life that are a violation of the criminal laws of the United States or of any state; appear to be intended to intimidate or coerce a civilian population; to influence the policy of a government by mass destruction, assassination, or kidnapping; and occur primarily within the territorial jurisdiction of the United States. [18 U.S.C. § 2331(5)]

"...he is terrorizing a group of people - women who need abortions." And you lost me. What? He's "terrorizing" people who ask for his services? Did he berate the women while he did his work or something?

"...and like that - POOF! - he's gone."

In order to have a legal abortion in the third trimester under Kansas law, the mother must have two MDs (none of whom can perform the procedure) certify that her life is endangered by the pregnancy and delivery of the child. Every one of Dr. George Tiller's abortions were within the framework of the law and he was careful to do so.

There is naturally a lot of hype over this incident but we all need to be careful to separate the wheat from the chaff.