If you mean the Muslim who was to give the address, it's a HER not a HIM.
And she must have made some mighty fiery statements on social media to lose this opportunity to rabble-rouse 65,000 listeners. All that talk of "safety" -- she probably was calling for genocide of the Jews.
She posted a link to a site calling for the abolishment of Israel
Unless they had evidence she was going to do that at the speech...then this is a 1st amendment issue. If you don’t get to do things in the future because GOVERNMENT decided what you said in the past is not good then the 1st amendment means nothing.