According to a CIA "Red Cell" report posted on the Wikileaks website August 25th, 2010...:
This CIA "Red Cell" report from February 2, 2010, looks at what will happen if it is internationally understood that the United States is an exporter of terrorism; 'Contrary to common belief, the American export of terrorism or terrorists is not a recent phenomenon, nor has it been associated only with Islamic radicals or people of Middle Eastern, African or South Asian ethnic origin. This dynamic belies the American belief that our free, open and integrated multicultural society lessens the allure of radicalism and terrorism for US citizens.' The report looks at a number cases of US exported terrorism, including attacks by US based or financed Jewish, Muslim and Irish-nationalism terrorists. It concludes that foreign perceptions of the US as an "Exporter of Terrorism" together with US double standards in international law, may lead to noncooperation in renditions (including the arrest of CIA officers) and the decision to not share terrorism related intelligence with the United States.
You can download the full CIA report in PDF format from Wikileaks, here. Here's the money quote:
Contrary to common belief, the American export of terrorism or terrorists is not a recent phenomenon, nor has it been associated only with Islamic radicals or people of Middle Eastern, African or South Asian ethnic origin. This dynamic belies the American belief that our free, open and integrated multicultural society lessens the allure of radicalism and terrorism for US citizens.