I’m suspecting that this isn’t the ‘whole story’.
One fact that I did note - it appeared that he was coming into the EU to work. Was he on a work visa, or was he planning to work while on a tourist permit? That might be reason enough for exclusion.
I’d also be interested in what kind of ‘fundraiser’ he was going to participate in.
Looks like I am on the right track:
“Another was that when Kevin Shilling, the owner of the media company at which Cantor was going to work this summer, called to try and intervene while Cantor was being detained, the customs agent told him that Chip should have lied to the customs agent,”
http://www.jewishpress.com/tag/chip-cantor/
Looks like he gave the wrong answer to the question ‘What is the purpose of your visit’, and is now playing the race card in the best Al Sharpton tradition.
You did read the part about the woman in the burkha photographing him and telling him he was not welcome in the EU, right?
That sounds like a little than "exclusion."