Nitasema mara ngapi....tribalism is not the issue illiteracy is the problem here. Coupled with a few selfish leaders who mislead their people you get an illeterate group being led by a spiteful person.
Othetwise if tribalism existed, the children would never play together, we would never travel, we would never do business.
That is why people will talk of tribalism in the slums and rural areas...but never in major town areas...its a narrative that the politicians use to solidify their political base!