He was not a nuclear scientist and he was a strong opponent of the present Iranian regime. WHat possible reason did Israel have for knocking him off? It was more likely the Iranian ruling thugs who did it - got rid of the opposition and gained a new excse to blame Israel and the USA. It's so transparent, but obviously you are more influenced by Iranian propaganda than by your own brain.
from the article: 'We will avenge Israel over murder of Iran nuclear scientist'