Medical
Half-beast creature, possesses people, cannibalistic. Nasty buggers. But I'd say no, they won't attack on sight. They might yell, act similar to how they did with us, but they shouldn't outright kill him. They didn't outright kill Josh. Tied him up and yet him incoherently ramble, Mike talked him down.
None of them are particularly terrible kids. They're just... teenagers that all made incredibly bad choices and paid for it far more than most do.