Christy Pardew, spokeswoman for Whose Foods, Whose Community?, an activist group protesting the forthcoming Whole Foods, says the issue is “keeping multinational chains out.” According to Ms. Pardew, the addition of a high-end grocery store to Jamaica Plain will result in higher rents, pushing low-income residents from the neighborhood. “It’s a term that real estate agents use,” she intoned, “called ‘the Whole Foods effect.’”