On a large scale there are differences, but on the scale of individuals, they are nearly identical from a psychological perspective.
Just the opposite, in my view. Out of all the examples given so far, the only one that is actually “tribal” was the Red Sox/Yankees example, because a Red Sox fan is never a Yankees fan, and vice versa.
In the case of politics, the fact that somebody is a social conservative does not indicate to you what their economic views are; and someone who is an economic libertarian may or may not be a conservative Christian. So, you can use the term “tribal” all you like, but you will have to constantly be defining in rather long sentences who is included in that particular “tribe” each time you use it.
Problematic, by my way of thinking.