I think planning for a future that may or may not come does no one any favors. You've got to focus on making your present character the best it can be, even if it means doing despicable evil shit. Zeb could say what he said because there was a nuance to it. It was the kind of shit people ACTUALLY said, instead of outright saying "I hate Mexicans."
So slap women, make babies cry, kill dogs, grave rob, burn flags, just make sure it MAKES SENSE. That's the difference between getting cheap heat and being a good heel.