I don’t know if it’s what happened here, but male camels can be very dangerous when they go into rut. They can really bite and slash with their teeth as well as stomp and kick.
Freegards
I don’t know the particulars, but it would be unlikely to have an intact male camel around people specifically because of the potential for anything from minor mishap up to death.
Camels are generally more tolerant than any exotics, but they are not pets. They are to be looked at, not touched. No mention of how/why the camel was not confined.
And no one goes to a petting zoo expecting to die.