I agree this shouldn't be a personal decision. People shouldn't be made to feel guilty about their consumption, or anxious about having to do a moral choice in the first place. All of the consumption choices should be ethical and sustainable. Unfortunately, they are not, so the individual lives with the burden.

The basis of traditional mexican food is plants based. Maíz, frijol, calabaza, chile, tomate, nopales, arroz, etc. Veganism is not incompatible with your culture, it's probably one of the easiest ones to convert.

The point is not to make white people feel better, it's to do something about the problem, to change the culture. Do you at least agree that (certain aspects of) the culture needs to change, and that that involves you?