You're fired... Get your shit and go!!

should have beat her ass

I'm not defending this prick but maybe next time you're cleaning the stalls try putting up something to keep people from doing what this dumbass did .
Commonsense seems to be in short supply these days
But some people are just assholes and need to be taught a lesson. I'd say you did just that !
He may look at people differently now .
Or him and his entourage may just beat the next cracker without a pressure washer senseless. Anyway you got your point across!