James Madison University students gathered around the preacher, singing a song of love and tolerance. With one guy on guitar, the group begins to sing 'How He Loves', a Christian song by John Mark McMillon. And with it, you can't hear the preacher at all.

http://www.dailykos.com/story/2014/09/18/1330604/--Anti-gay-preacher-visits-campus-You-have-to-see-what-the-students-did-next?detail=facebook

Edit: Scroll down for Alison Krauss and Union Station performance of "When you say nothing at all".