He was identifying with delegates from 60 countries going to a three-day occasion on fanaticism that takes after assaults in Denmark and France.
Mr Obama said the world needed to stand up to the philosophies that radicalize individuals.
He said those heading gatherings like Islamic State and al-Qaeda were not religious pioneers however terrorists.
Mr Obama said partner Islamic State or al-Qaeda with Islam would be becoming tied up with the publicity of those gatherings, testing pundits who have addressed him for not portraying late assaults as the work of "Islamic radicals".
View Source : http://www.bbc.com/news/world-us-canada-31523213