Pres. Carter, during Iran's hostage crisis, called them "terrorists and anarchists." Reagan called them "barbarians." That was before Hezbollah and Hamas, before they ever spoke of closing the Strait, before they threatened to take over Iraq, before they became a Russian client, and before they ever considered becoming nuclear. The U.S. does not really want an anti-Western despotic country to control 1/3 of the world's oil under their nuclear umbrella.
Syrian group says Nusra abducts its leader, in blow to U.S. plan (Reuters)
from the article: U.S. army chief heads to Israel as fears over attack on Iran mount