The U.S. Commission on International Religious Freedom has issued a report (full text) on The Global Persecution of Jehovah's Witnesses. The Report says in part:
The governments outlined in this report tend to target Jehovah’s Witnesses as “extremists” or because of their conscientious objection to military service. Those countries that persecute Jehovah’s Witnesses on the basis of vague extremism accusations, however, have failed to provide any evidence to demonstrate that members of the community have ever been involved in any act of violence against the state or its citizens, or called for the overthrow of any such government. On the contrary, the group is doctrinally apolitical and pacifist, and the prosecution of its members as dangerous “extremists” demonstrates the capacity for abuse inherent in vague and sweeping anti-extremism legislation.