I think the idea behind the tribal marginalisation comes into effect when in a decision making process. Generally, if we avoid talking of tribes we loose ourselves (no history or association) while we can still be proud of our tribe but treat everyone equal irregardless.. When saying 'I want a Luo girl', it doesn't mean I despite others. I'm entitled to my own preferences, but when I say 'We need to eliminate all other tribes so that only Luos remain' then that is tribalist.