The guys said he wasn't sure WHAT nationality the shooter was, only that he WASN'T white,and could have been Hispanic or from the Middle East.
Cavuto was basically cautioning people not to jump to any conclusions before official word, which was good advice.
Earlier, CNN put on some idiot on the phone who claimed to be there, who said the shooter was a fat middle-aged white guy with a pony-tail who kept screaming he had been fired.
Cavuto handled his interview much more professionally.