American antipathy to the MEK stretches back four decades, when it was first formed in the 1960s with an anti-US, Marxist-Islamist ideology. Violent “armed struggle” was glorified from the start.
The group assassinated at least six US military advisers and citizens in Iran in the 1970s, supported the Islamic revolution and then the seizure of the American Embassy in 1979, and tried to block any deal with what it then called "the US, this satanic force threatening the world ... the main adversary."
US government documents frequently use the term "cult-like" when describing the MEK, and describe "years of ideological training" for members akin to "brainwashing." The MEK has long denied that it is a cult and routinely charges critics with being agents of the Islamic Republic.
The MEK says it renounced violence in 2001, after claiming responsibility for 350 attacks in 2000 and 2001, according to a RAND tabulation. It is not known to have carried out any attacks for several years, though a 2004 FBI report found that the group was "currently actively involved in planning and executing acts of terrorism."
That conclusion was based on wiretaps of calls between MEK bases and headquarters in Iraq, France, and Los Angeles that discussed "specific acts of terrorism to include bombings" – and were corroborated by French intelligence and German police wiretaps, according to the FBI report.