Adding a team was the wrong strategic decision

This team does not report to me, I will ensure their demise and make sure their work is never adapted by anyone within my sphere of control. It is easy to justify such behavior behind snazzy terms but I have seen this so many times that it isn't funny. Sometimes leadership may make a decision you may not agree with or even understand but focusing on why it happened, what you can do to align yourself and how you can help product, customer and business succeed are more important than your walled garden of carefully controlled conway conventions. It is right there in your own terminology of tribes, how very tribal.

Am I missing something - what's with the "tribe" terminology?

Funny, I was just involved in the opposite of this, where the PM proposed a new "E2E" team (coincidentally also called the CX team) that reported to someone outside the "tribe", and the proposal was shot down by leadership. I really didn't give it much thought since, but after reading this I want to find out why they shot it down.