Because she says O'Reilly is "way too rude". I find it odd that she can cozy up to the North Vietnamese during the Viatnam war, but she is affraid of O'Reilly. We all know the real reason she dosen't want to appear on the Factor, she knows O'Reilly will crush her. "He's way too rude!" What an excuse. Ho Chee Min wasn't rude?