> you are not explaining why i would care though?
Because many people endeavour to be better people because they care about other people.
> How do propose getting more diversity without some kind of support or appreciation of the value of the under represented?
You could improve diversity without appreciating their value, as well; following proscribed formulas to balance quotas doesn't guarantee that those applying the formula are going to reform their views.
I'd improve diversity by dismantling systemic barriers; like unequal access to education, which must including access to after-school support, quality food, and so on.
> but where is the incentive for the other kids to keep playing together if the historical effects of the bullying are not addressed?
Because they are kids, and many kids are quick to forgive and forge new relationships.