All lives are important, but my neighbors and family are more important than strangers.

On a connected planet, who is not your neighbor?

Is this a topology question?

People who live far enough away that I don't see them with any regularity and whom I have no emotional or social connection.

Sounds rather selfish

Wallowing in tribalism is like wallowing in the way humans suck at statistics, while pledging allegiance to one's casino.

Sports fandom is much less ridiculous because it is at least a benign outlet for the human tribal mentality.

Tribalism is a fundamental facet of our species. Aspiring to act as if it weren't is not a strategy likely to achieve much beyond lamentations.

Nationalism != tribalism. Nationalism exploits tribalism, in the way that casinos exploit other natural cognitive disabilities. That does not doom all of us to losing our savings at the casino. In fact gambling has a much longer history than nationalism. 20th c. nationalism is a johnny-come-lately, like video poker machines, and could be a passing fad.