Arson, Cracked Testicles, and Internet Death Threats: How Animal Rights Extremists Are Learning From the People Who Murdered George Tiller Jordan Heller · 01/16/13 04:30PM "We will...strap you into a monkey restraining device and use industrial pliers to crack your testicles like walnuts." That was the simple message that medical researcher Dr. Donal O'Leary received in October 2011.