Iranian leaders have repeatedly stated that the demise of Israel is imminent. Iran's intentions to build a nuclear bomb are now widely acknowledged. This nuclear scientist was aiding in the construction of weapons that could murder millions of innocent people. Iran clearly already considers itself at war with Israel and the United States, and the killing of this scientist was a defensive action in the war.
Ron Paul represents the voice of appeasement and willful blindness regarding the Iranian jihad.
(Video thanks to Wimpy.)