As I understand it, a fatwah can only be issued on behalf of a nation-state. I remember reading that any fatwah issued by an individual can safely be ignored by any moslem. (*)
The same applies, I understand, to the lesser jihad (or holy war) whereas the greater jihad (or struggle against wrong-thinking) can and should be invoked by an individual .. but it only applies to him/herself.
(*) The fatwah issued against Salman Rushdie by the late Ayatollah Khomeini was issued by the Ayatollah in his role as supreme cleric of Iran. It still stands, because Khomeini died before it could be revoked.
NB: I am NOT a Moslem, nor a true scholar of Islam .. merely a journalist who has an interest in covering all sides of this issue.
Sadim