I don’t know how much more pointed you can get in seeing the war on terror as a struggle of good vs. evil. A clash of civilizations occurs precisely when there are two competing visions of what constitutes the good. But of course, there is no clash of civilizations. From MEMRI, with thanks to EPG:
Recently, several high-ranking Iranian leaders, among them Supreme Leader Ali Khamenei and President Muhammad Khatami, expressed views on the achievements of Iran’s Islamic Revolution and the legacy of Ayatollah Ruholla Khomeini, and on the relationship between Islam and Western culture and values. Both men attacked the U.S. for its handling of affairs in Iraq. Along with stressing the need to instill Ayatollah Khomeini’s legacy among the younger Iranians who never knew him, Iranian Leader Ali Khameneistated that not only is Khomeini’s political thought appropriate for all of humanity’s needs, but that the source of human suffering is “liberal democracy.” Khamenei attacked the U.S. and stated that the reason for the “disgrace” (that is, the abuse of prisoners at Abu Ghureib prison) was that “liberal democracy is devoid of morality.” In contrast, Iranian President Muhammad Khatami expressed his support for borrowing from Western values and blending them into Islamic culture. At the same time, however, Khatami stated that the root of all terrorism is superpower violence.
You can read their actual statements at the MEMRI link.