Assassination is usually a bad policy because the bullet (or bomb) is an equalizer. It is easy for Iran to send some tourist who will assassinate some Israeli academic nuclear physicist. Such people don't have state protection, their real protection is the ease at which similar revenge actions can happen.
Palestinian Red Crescent say 23 injured around West Bank and Jerusalem (Haaretz)
from the article: Iran rebukes Azerbaijan for allegedly aiding Israel's Mossad