The West has its own good and bad terrorists
The group periodically conducts terrorist acts against the Islamic Republic. As a matter of fact, it is the USA and the EU that use the group for their political purposes to destabilize Iran. The West hopes that the group will become a tool to tame Iran. As for Mujaheddins[MKO/MEK/PMOI], they have been cooperating with the West actively for over 20 years already. They used to have their one and only strongman – Saddam Hussein, Iran’s sworn enemy. He could use them in his own interests whenever he wanted to.