Former U.S. President Donald Trump and former Defense Secretary Pete Hegseth have characterized ongoing tensions with Iran as a continuation of the global "war on terror," which commenced following the September 11 attacks in 2001. Their assertions link Iran's activities to the broader Islamist extremist threat that originated with Sunni terrorist groups like al-Qaida.
While Iran has traditionally opposed Sunni extremist groups such as al-Qaida, the ideological similarities between Sunni and Shia Islamist movements are significant. The Shia-dominated Iranian government has cultivated and supported various proxy groups, including Hezbollah in Lebanon and the Houthis in Yemen, both Shia factions, but also extends backing to Sunni organizations such as Hamas, which is affiliated with the Muslim Brotherhood. Tehran positions itself as a central force in global Islamist politics, aiming to lead both Sunni and Shia Islamist movements.
Iran's 1979 Islamic Revolution marked the first establishment of a theocratic state based on revolutionary Islamist principles, inspiring Islamist movements worldwide. The Iranian leadership has historically promoted a vision of government deeply intertwined with strict interpretations of Islamic law (sharia) and opposition to Western nations, particularly the United States and Israel.
Trump and Hegseth emphasize that Iran is "the world’s chief state sponsor of terrorism," a designation recognized by many Western governments but rejected by Tehran, which has described such claims as baseless. This framing aligns with ongoing concerns about Iran’s nuclear ambitions, which U.S. officials argue must be thwarted to prevent the proliferation of nuclear weapons to Islamist extremist groups or proxy militias.
The conflict has manifested in regional proxy warfare, notably in Yemen where the Houthi rebels control significant maritime routes along the Red Sea and Bab al-Mandeb Strait, impacting global oil shipments. Iranian-backed militias in Iraq have also targeted critical Saudi infrastructure, including an east-west oil pipeline, prompting its shutdown and highlighting Iran's continued strategic capabilities in the Middle East.
The legacy of the post-9/11 counterterrorism effort is mixed. While Sunni extremist groups such as al-Qaida and the Islamic State have been territorially weakened, their influence persists globally, especially in Africa, and through digital platforms. Western intelligence and security services have strengthened counterterrorism measures substantially, but the threat remains dynamic and evolving.
The terrorist attacks by Hamas on October 7, 2023, which killed approximately 1,200 people, mostly Israeli civilians, have been described by some analysts as a "second 9/11" due to their scale and brutality. This attack reportedly intensified global antisemitism, with notable increases in hate crimes, particularly in countries such as Australia. The response to these attacks reflects ongoing debates about the definition and recognition of terrorism, especially concerning violence against Israelis and Jewish communities.
The discourse surrounding Islamist extremism continues to evoke strong reactions, with some Muslim leaders distancing their faith from terrorism, while others highlight the explicit ideological links embraced by Islamist terrorists and regimes like Iran’s. The evolving nature of this conflict suggests it will remain a central focus of international security concerns for the foreseeable future.