I can sympathize with the guy. I hate mayo and frequently say trying to sneak it into my sandwich is a killing offense. But I usually don’t have a pistol handy. Outlawing mayo would prevent over-mayo killings. Guess this guy really, really, doesn’t like mayo-—even less than me?
Depending on where the Subway (or any of the fast-food joints) is located, the rule should be to never ask for mayo unless you have a phlegm detector with you...
A couple of decades ago, in more innocent times, people joked about "white culture." Martin Mull had a TV comedy special about "white culture." And there was a website, "Things White People Like."
Mayo was was White Thing. Part of White Culture. Along with Tupperware, Labrador Retrievers, and exotic ethnic restaurants. (White people love being the only white people in an exotic Third World restaurant. It makes them feel more "authentic" and superior to other white people.)
Mayo. Definately a White Thing.
So you don’t see anything wrong with killing a person over may0.