The rapid spread of hoof and mouth disease in the UK has been suggested by many to have been spread by the violet pro Animal groups in England. Of course before 9/11 nothing would have been said or done on this!
One of the leading PETA hags this summer said that she would have no problem using Hoof and Mouth disease in America!
As far as non violent in America, some of the PETA terrorist in the field with fishers are far from non violent! Particuliarly if they are back in the forests and feel that they can get by with violence!
I did my Master's Thesis on political violence of animal right, environmental, anti-industrial, militia, pro-life, and end-times groups. The environmental, and animal rights were as violent as the pro-life except they had not taken any lives.
I believe there is a 99.9 percent chance that it is a Muslim terrorist group operating in the U.S.