"The heroes of that story were our Christian friends, our Christian evangelical friends. At that time, [the] Rev. Jim Wallis called me up ... and explained how [the evangelical community] did not want me to engage with this person. They said, 'This is not your problem. This is a problem within the Christian community. Let us deal with him.' And they were the ones, in fact, when he came up trying to meet me, [they] met him at the airport and forced him to back down."
Links:
[1] http://sojo.net/press-source/npr
[2] http://www.npr.org/2012/05/09/152192549/creating-a-new-vision-of-islam-in-america