I wouldn't discard him though he'd be lectured on the PERFECT pizza possible by the hand of man. Or woman. Or other.
That's right - THE SPICY HAWAIIAN !!! {aloha !}
Regular crust. Regular mozza. Mild sauce (can be spicy to taste). Ham slivers (used to be "Canadian bacon"). Almost crisp hickory smoked bacon. Pineapple chunks. Fresh jalapeno slices (no asshole, no navel) about a half inch thick. All four topping should synergistically create an impenetrable layer of deliciousness that will have the diner cry out "BEHOLD !!! PERFECTION".
I wouldn't have fired the guy though. I mean, it's good to have standards. Also, he might have been out of pineapple. Who knows? this is the internet after all.