"Tribal Acceptance" in the sense of that if you call out any American there are norms that they attach to their sense of community around killing, hunting, purchasing meat. If you describe a scenario of the suffering of someone's dog and mention the pain that they are in being a bad thing.. it might reach someone far more effectively than questioning their morality when it comes to their eating habits. Especially when the entire culture supports their decisions. Anyone who does not fit in with the "tribe" is labeled as an outcast. This is the aspect of human psychology I'm referring to.
"Dissolve ignorance slowly around the edges" - Guru Singh
"Humans evolved in the context of intense intergroup competition, and groups comprised of loyal
members more often succeeded than those that were not. Therefore, selective pressures have
consistently sculpted human minds to be "tribal," and group loyalty and concomitant cognitive
biases likely exist in all groups."
(PDF) Tribalism Is Human Nature