I don't think this is the work of the Mossad. But I am compelled to wonder whether there are Iranians or other muslims out there who are also not thrilled by the prospect of Iran creating nuclear bombs? I have enough respect for religion in general - including moderate Islam - to believe they too would not want nuclear destruction.
U.S. Democratic Senator Merkley airs support for Iran nuclear deal (Reuters)
from the article: U.S. website: Mossad killed Iranian nuclear physicist