In congressional testimony, U.S. intelligence officials said that they believed Iran was now willing to launch attacks directly at the U.S. homeland:
U.S. officials said they have seen no intelligence to indicate that Iran is actively plotting attacks on U.S. soil. But Director of National Intelligence James R. Clapper Jr. said the thwarted plot “shows that some Iranian officials — probably including Supreme Leader Ali Khamenei — have changed their calculus and are now more willing to conduct an attack in the United States in response to real or perceived U.S. actions that threaten the regime.”
This is pretty good indicator that, whatever else can be said about the country's rulers, Iran is not driven by suicidal impulses. If Clapper's interpretation is to be believed, Iranian officials haven't been sitting around wondering how to blow up buildings in Boise since coming to power. They have embraced attacks against the U.S. homeland only after the U.S. and its allies have ratcheted up the pressure on them (which, incidentally, does include lethal attacks on Iranian soil).