The communists at Mother Jones and elsewhere, use the term Tribalism as a derogatory implying a cultural weakness in identifying with a group as in community. Tribalism, the very word sounds like a trip back in time, back to a more ignorant existence where US and THEM, were the greatest dividers literally speaking. It is directed at Christians and Whites as a method of overcoming the logical superiority of that group. To break that group down into more fundamentally weaker groups. This way each smaller group may be attacked far more effectively.