I agree with this statement. Remember that it was an early pioneer--also someone once considered to be a monster--Bernard Nathanson, who was himself responsible for 75,000 abortions, who saw the light and repented his ways, becoming a strong pro-life advocate. Many abortionists have also found Christ and come to the other side. Violence is not the way. Truth is.
All this violence did was to strengthen the hand of the abortionists.