STATE COLLEGE — Former U.S. Senator Rick Santorum is appearing at a series of campus events organized by California-based conservative activist David Horowitz, including three in Pennsylvania.

The Islamo-Fascism Awareness Week appearances include stops at Penn State and at the University of Pennsylvania and Temple University in Philadelphia.

Santorum says Americans do not understand the gravity of the threat from Islamic extremism. Critics, including many in the Tuesday night crowd in State College, argue that he seems to lump all Muslims and Islam into one terrorism-supporting category.

At Penn, College Republican leaders have agreed to use the term "terrorism awareness." Muslim American Association Executive Director Mahdi Bray says the "Islamo-Fascism" term "demonizes an entire faith group."