Have no idea why they rejected him BUT - the very nice lady he was talking to is black, the security person is black, the only other person is black - they all look like decent people who have real jobs and the lady was perfectly polite.
Again, not sure the exact reason why he was rejected, but I sincerely doubt it was due to racism. maybe I am wrong, but she has got to be dealing with people of all types on a regular basis and she stays calm and polite through his whole diatribe.
He could be black, white, or green - his attitude is horrible.