With the guilty verdicts rendered today in the case of Fort Hood shooter Nidal Hasan, we are reminded of the threat radical Islamic terrorism poses to the American homeland. A report filed by the Washington Free Beacon on Aug. 16 focused on the threat of domestic terrorism. That report cited research conducted by the CI Centre, a Washington, D.C.-area national security think-tank founded by retired FBI official David G. Major.

The CI Centre identified 148 domestic terror plots since 2001. Of those, 114 were motivated by the radical Islamist "Salafist doctrine." That's the CI Centre's terminology for those "motivated by Caliphate doctrine." So among the nearly 150 domestic terrorist plots, 77 percent were motivated by radical Islam.

The CI Centre research identified 398 suspects involved in those 148 plots. Among them, the CI Centre culled out four that arguably could have been included in the "Salafist" group but they chose to consider separately. Those were the DC snipers, the Liberty City Seven (Miami), a "state sponsor" case (the suspect was Manssor Arbabsiar) and the LAX El-AL shooting. Including those four additional plots increases the 77 percent to nearly 80 percent of the domestic based terror plots involving some variant of radical Islam.

The CI Centre research essentially parallels the research conducted by IPT more than two years ago from available Department of Justice (DOJ) records concerning terrorism related prosecution cases. At the time, we found more than 80 percent of all convictions tied to international terrorist groups and homegrown terrorism since 9/11 involved defendants driven by a radical Islamist agenda.

These studies clearly show that, while not all terror plots against the U.S. and terrorists and their supporters arrested within the U.S. involve radical Islamists, the significant majority do. To ignore factual reality is foolhardy and risky.