Residents in New Jersey may disagree about their favorite kind of pizza, but just about everyone agrees that deep dish pizza is not pizza, according to Twitter.

The @NJGov Twitter handle fired off at the city of Chicago, a place known for its deep dish pizza, saying, “welcome to the thunderdome @chicago. ur pizza is a casserole.”

The City of Chicago Twitter handle responded, saying, “Appreciate the feedback, but we don’t need advice from anyone who eats generic spam for breakfast.”

The account also went a step further, saying, “An attack on Chicago pizza—deep dish or tavern—is an attack on all of us.”