-* Modi’s supporters call for boycott of foreign brands in India -* U.S. tariffs on Indian goods stoking anti-American sentiment -* India is key growth market for American companies -* Group linked to Modi’s party protesting against foreign brands

NEW DELHI, Aug 11 (Reuters) - From McDonald’s and Coca-Cola to Amazon and Apple, U.S.-based multinationals are facing calls for a boycott in India as business executives and Prime Minister Narendra Modi’s supporters stoke anti-American sentiment to protest against U.S. tariffs.