Please sign this petition to thanks Donald Trump for the free marketing of Islam, and for those who don't know, this is a marketing technique called the "word of mouth".

Word of mouth or viva voice, is the passing of information from person to person by oral communication, which could be as simple as telling someone the time of day. Storytelling is a common form of word-of-mouth communication where one person tells others a story about a real event or something made up.