(AFP) The FBI encouraged and sometimes even paid Muslims to commit terrorist acts during numerous sting operations after the 9/11 attacks, a human rights group said in a report published Monday.

Aided by Columbia University Law School’s Human Rights Institute, Human Rights Watch examined 27 cases from investigation through trial, interviewing 215 people, including those charged or convicted in terrorism cases, their relatives, defense lawyers, prosecutors and judges.

In the cases reviewed, half the convictions resulted from a sting operation, and in 30 percent of those cases the undercover agent played an active role in the plot.

The report cites the case of four Muslim converts from Newburgh, New York who were accused of planning to blow up synagogues and attack a US military base.

A judge in that case “said the government ‘came up with the crime, provided the means, and removed all relevant obstacles,’ and had, in the process, made a terrorist out of a man ‘whose buffoonery is positively Shakespearean in scope,'” the report said.

The rights group charged that the FBI often targets vulnerable people, with mental problems or low intelligence.

It pointed to the case of Rezwan Ferdaus, who was sentenced to 17 years in prison at age 27 for wanting to attack the Pentagon and Congress with mini-drones loaded with explosives.

An FBI agent told Ferdaus’ father that his son “obviously” had mental health problems, the report said. But that didn’t stop an undercover agent from conceiving the plot in its entirety, it said.