someone would want to kill Massoud aren't. Those who regard the Iranian government as evil or dictatorial instantly conclude the government, or some part of it, is responsible. Those who regard the Israeli government as evil or bloodthirsty instantly conclude they are behind it, and those who regard the US government as evil or hegemonistic instantly conclude they are behind it. Odds are, it was someone who couldn't tell you the difference between a nuclear physicist and a nuclear bomb, who thought that they could get some brownie points for this killing.
Palestinian youths throw stones at security forces in Shoafat, E. Jerusalem; none injured (Haaretz)
from the article: ANALYSIS / Iran scientist likely killed by opponents of nuclear program