A lot of people of his ilk (tree-hugging, kumbahya, 'can't we all get along', commies) believe this line. Basically they don't believe the Bible, and they don't understand why anyone else takes their Religion seriously. It is all a matter of getting everyone employed at good wages (impossible), and all will be well.
The Koran directs its followers to destroy non-Islamics.
There will be no peace until Jesus returns, and it is not true that "Every Religion wants Peace".
And nobody can really “believe the bible” until believing God. Because the bible insists on being a personally relevant work, not just somebody else’s story.