Masoud Khodabandeh said deproscribing the MKO by the EU is a politically-motivated move which leads to support for the terrorism spread by the MKO.
He told the Islamic republic news agency that Europeans should take the responsibility of future measures by MKO terrorists who are going to be allowed to enter Europian countries.
"You [the Europeans] cannot defend terrorists [by deproscribing the MKO] and at the same time claim you are countering terrorism," he said.
Khodabandeh, who is now the spokesman of a non-governmental organisation dedicated to help members abandoning the MKO, said European leaders have adopted a double-standard policy towards the issue of terrorism.
"The MKO case proves that the European Union behaves in a discriminatory manner," he said, adding that Europeans are well-aware that MKO members have conducted many terrorist operations in the past three decades.
He said the MKO bears "no significance" in international developments as "it has now expired".
Khodabandeh added that MKO members, if released from the Ashraf Camp in Iraq and admitted to European countries, would spread insecurity and terrorism across Europe.
He said the terrorist nature of the MKO has never changed as its members are wearing uniforms and taking military drills in the Ashraf Camp.
He added that Mojahedin-e Khalq Organisation has not only slaughtered many Iranians but also "has been directly engaged in killing Iraqi Shiites and Kurds and suppressing even its own members".
Out of around 3,000 MKO members, he suggested, some 2,000 are in critical health conditions "and are willing to leave the Ashraf Camp."
Khodabandeh said if Europeans do really want to extend their help to these people trapped by the MKO, they should welcome them to Europe--a move he said his organisation will favour.