Since 1977, when more extreme elements in the anti-abortion movement began attacking clinics and personnel,
eight doctors or staff members have been killed,
according to data collected by the National Abortion Federation.
There have been an additional 17 attempted murders,
42 bombings,
186 arson attacks and
many thousands of violent threats or other illegal acts against abortion clinics.
http://mobile.nytimes.com/2015/11/29/us/siege-highlights-security-used-in-abortion-clinics.html
pro-birth murderous terrorism