It is a custom inherited from the ancient Mesoamerican peoples that lived in Mexico six thousand years ago. These cultures "domesticated" the chili and used it to spice-up their foods, which were...
First of all, you have a misspell, it should say: Do all Mexicans eat Mexican food? And no, not every Mexican eats Mexican food, some are vegeterians, but they eat Italian, American, Arabic, etc,...