"We wish to refer to the recent allegations posted on the website juntakareporter, citing an alleged statement and certificate from UNESCO declaring "Islam as the most peaceful religion of the world". Such statement was never made by the Organization and that the certificate reproduced on this website is a fake one. The website that published this information is a satirical media.
UNESCO has never had any official relationship with the entity referred to as "International Peace Foundation", nor has it ever supported such a statement or granted any diploma of this kind."
http://www.unesco.org/new/en/media-services/single-view/news/unesco_denounces_fake_statement/

Please check your facts before promoting this kind of old fake news.