That's why performance art is invariably so lousy - it spits in the face of honest human reaction, all those trust fund frauds locking themselves in a bathroom and claiming it is in solidarity with actual prisoners who don't have Guggenheim fellowships.The artist, obviously, defends himself as best he can. It simply isn't enough.
I believe this particular artist to be of fairly poor artistic merit. He seems unconscious of the history of jumps in performance art, as well as unconscious of how delicate a matter he is entering by referring to 9/11. What's more, he acts with very little sensibility to the issues he's addressing: and when you're an artist, that's a cardinal sin.
On the other hand, it shows how fragile the U.S. still appears, how traumatized, to the extent of censoring anything that comes close to Ground Zero.