Khamenai is a member of Hojjatieh, so is Ahmadi-Nejad, Rajavi was too and many others.
And as far as SAVAK destroying anything, first of all Hojjatieh was created by SAVAK itself with a green light from the late Shah; simply the mullahs were too powerful for the Shah. And secondly, the Islamic republic's security and intelligence apparatus is multi-layered, at least five times bigger and much more sinister than SAVAK, but even they can't destroy much. Simply, force will not endure, and if the Shah proceeded to crack down and try to destroy more people, his rule may have lasted longer, but in the end the same thing would have happened. For a time people of Iran have had a romance with an "Islamic state" of sorts and fantasised about what it might be like, now they know! Good or bad, theocracy simply belongs in the past!