As an Israeli volunteer who recovers corpses, Moti Bukjin has worked at horrific disaster sites for decades, but nothing readied him for the carnage Hamas gunmen unleashed on a desert music festival on Saturday.

"It turns out things can be much, much worse," he said.

He was among the first responders to the site of the massacre at the Supernova festival at a kibbutz near Gaza, where 270 revelers were gunned down or burnt in their cars.