Retired CIA officer Clare Lopez has published an excellent, detailed analysis of the threat from Hezbollah as an arm of Iran’s arsenal.
Here is a brief excerpt and link to her report, entitled Hizballah: Iran’s Other Looming Threat to the West
The single most important fact to understand about Hizballah is that its chain of command goes directly to the Iranian Supreme Leader, the Ayatollah Ali Khamenei, by way of the Iranian Islamic Revolutionary Guard Corps (IRGC) and Qods Force. That Iranian connection, as well as Hizballah’s close and long-standing relationship with al-Qa’eda, the global reach of this Shi’ite jihadist group, and above all, its extensive presence and criminal activities in the Western Hemisphere, including inside the United States, all merit a closer look. With U.S. national security directly in Hizballah’s cross-hairs, it’s more important than ever to understand what this group is, who leads it, what has motivated them along a bloody 30-year trail of terrorism, and what damage this group is capable of inflicting on American interests.
For even as Hizballah is an Islamic terror organization, an Iranian proxy for power projection, a Transnational Criminal Organization, and a Lebanese military, political, and social domestic entity, it is above all a direct threat to U.S. national security. After all, and despite a complete media blackout on the topic that prevails to this day, on Iranian orders and working together with al-Qa’eda, Hizballah participated in the worst strike ever against the American homeland: the attacks of 9/11. There is no threshold, ideological or otherwise, that Hizballah has not already crossed or would not cross again, given a direct order from Tehran.
Word out of London in late 2013 is that the U.S. is engaged in secret, indirect negotiations with Hizballah, with British diplomats acting as intermediaries. Those talks followed closely on the U.S. capitulation to Iran over its nuclear weapons program during November 2013 discussions in Geneva and reflect a White House policy of seeking to normalize relations with the regime designated by the Department of State as the number one global state sponsor of terror. Hizballah remains a designated terror organization on the Foreign Terrorist Organizations (FTO) list. And while the story about the U.S.-Hizballah talks in London made the Israeli and U.K. media, not one major U.S. media outlet thought it significant to report that the U.S. administration is reaching out to mend relations with what many describe as the most dangerous Islamic terror organization in the world.