I am with you all the way. I think we have a terminology problem.
I am not educated in sociology (or very much of anything else for that matter) but I think of tribalism as having an us / them - we / other dynamic about it.
Nothing at all wrong with knowing your history and your heart going woooooooh at the thought of that heritage (as Celtic fans would have it) but when it becomes a fear of organic change and a fear of an imagined potential for corruption of that history and that heritage from outside forces then there is trouble ahead.
Why else do racists use the language of illness and disease when they talk about migrants? They feel it as a personal assault from within and something that subtracts from their health rather than adds to their wealth.